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d475e76271fb7bf41a5d9dedb08461ac7d0f80d1c3caafa22d24a87bff625512
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2026-02-02T00:00:00-05:00
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Margin-Based Generalisation Bounds for Quantum Kernel Methods under Local Depolarising Noise
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arXiv:2601.23084v1 Announce Type: new Abstract: Generalisation refers to the ability of a machine learning (ML) model to successfully apply patterns learned from training data to new, unseen data. Quantum devices in the current Noisy Intermediate-Scale Quantum (NISQ) era are inherently affected by noise, which degrades generalisation performance. In this work, we derive upper and lower margin-based generalisation bounds for Quantum Kernel-Assisted Support Vector Machines (QSVMs) under local depolarising noise. These theoretical bounds characterise noise-induced margin decay and are validated via numerical simulations across multiple datasets, as well as experiments on real quantum hardware. We further justify the focus on margin-based measures by empirically establishing margins as a reliable indicator of generalisation performance for QSVMs. Additionally, we motivate the study of local depolarising noise by presenting empirical evidence demonstrating that the commonly used global depolarising noise model is overly optimistic and fails to accurately capture the degradation of generalisation performance observed in the NISQ era.
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https://arxiv.org/abs/2601.23084
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Academic Papers
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8442c0efd8ee3bfadceb02460732a93aaafe8ac4f2af28b9e3115272c01913cc
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2026-02-02T00:00:00-05:00
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TopoLS: Lattice Surgery Compilation via Topological Program Transformations
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arXiv:2601.23109v1 Announce Type: new Abstract: Fault-tolerant quantum computing with surface codes can be achieved by compiling logical circuits into lattice-surgery instructions. To minimize space-time volume, we present TopoLS, a topological compiler that combines ZX-diagram optimizations with Monte Carlo tree search guided by different operation placements and topology-aware circuit partitioning. Our approach enables scalable exploration of lattice surgery structures and consistently reduces resource overhead. Evaluations of various benchmark algorithms across multiple architectures show that TopoLS achieves an average 33% reduction in space-time volume over prior heuristic-based compilers, while maintaining linear compilation time scaling. Compared to the SAT-solver-based compiler, which provides optimal results only for small circuits before becoming intractable, TopoLS offers an effective and scalable solution for lattice-surgery compilation.
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https://arxiv.org/abs/2601.23109
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Academic Papers
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b777ef6d2417d858c8287e4514cabe8f6fb67db5b590e553674c47668e7de1fa
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2026-02-02T00:00:00-05:00
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Free encoding capacity: A universal unit for quantum resources
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arXiv:2601.23116v1 Announce Type: new Abstract: A perfect d-dimensional quantum channel can convey log d-bits of classical information by encoding messages in d-orthogonal quantum states. Alternatively, for every quantum state at the senders end, there exist d-encoding operations which produce d-orthogonal quantum states. Transmitting which via a d-level perfect quantum channel it is possible to communicate log d-bits of classical information. But what if the set of encoding operations is restricted only within a physically constrained class? Here, we consider such a class of encoding operations to be the set of free operations for any quantum resource theory and show that the constrained capacity - namely, the free encoding capacity (FEC) emerged as a unit of the corresponding quantum resource. Moreover, we show that for the pointed resource theories - a resource theory admitting only a single free state - FEC becomes a faithful resource measure also. We also discuss the implications of FEC in the question of resource-theoretic state transformations and the possibility of extending its faithfulness for general quantum resource theories.
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https://arxiv.org/abs/2601.23116
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a6f00f5191c88399d1b292acae617845aacdf99acdea682940c541ffcd7e9ce3
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2026-02-02T00:00:00-05:00
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Compact U(1) Lattice Gauge Theory in Superconducting Circuits with Infinite-Dimensional Local Hilbert Spaces
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arXiv:2601.23150v1 Announce Type: new Abstract: We propose a superconducting-circuit architecture that realizes a compact U(1) lattice gauge theory using the intrinsic infinite-dimensional Hilbert space of phase and charge variables. The gauge and matter fields are encoded directly in the degrees of freedom of the rotor variables associated with the circuit nodes, and Gauss's law emerges exactly from the conservation of local charge, without auxiliary stabilizers, penalty terms, or Hilbert-space truncation. A minimal gauge-matter coupling arises microscopically from Josephson nonlinearities, whereas the magnetic plaquette interaction is generated perturbatively via virtual matter excitations. Numerical diagonalization confirms the emergence of compact electrodynamics and coherent vortex excitations, underscoring the need for large local Hilbert spaces in the continuum regime. The required circuit parameters are within the current experimental capabilities. Our results establish superconducting circuits as a scalable, continuous-variable platform for analog quantum simulation of non-perturbative gauge dynamics.
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https://arxiv.org/abs/2601.23150
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Academic Papers
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e6d209d8729b1b0298f05e78c233778c93f054f08b7f924542c7b12b3143b0b3
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2026-02-02T00:00:00-05:00
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Complete Hierarchies for the Geometric Measure of Entanglement
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arXiv:2601.23243v1 Announce Type: new Abstract: In quantum physics, multiparticle systems are described by quantum states acting on tensor products of Hilbert spaces. This product structure leads to the distinction between product states and entangled states; moreover, one can quantify entanglement by considering the distance of a quantum state to the set of product states. The underlying optimization problem occurs frequently in physics and beyond, for instance in the computation of the injective tensor norm in multilinear algebra. Here, we introduce a method to determine the maximal overlap of a pure multiparticle quantum state with product states based on considering several copies of the pure state. This leads to three types of hierarchical approximations to the problem, all of which we prove to converge to the actual value. Besides allowing for the computation of the geometric measure of entanglement, our results can be used to tackle optimizations over stochastic local transformations, to find entanglement witnesses for weakly entangled bipartite states, and to design strong separability tests for mixed multiparticle states. Finally, our approach sheds light on the complexity of separability tests.
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https://arxiv.org/abs/2601.23243
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Academic Papers
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52fc0e60b6a565220368f8d967ba1ee2644485e7a50405c050272822799b9edb
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2026-02-02T00:00:00-05:00
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Understanding multiscale disorder in superconducting nanowire single photon detectors
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arXiv:2601.23277v1 Announce Type: new Abstract: Superconducting nanowire single-photon detectors are central to applications across quantum information science. Yet, their performance is limited by the effects of disorder and electrodynamic inhomogeneities that are not well understood. By combining DC transport, dark-count measurements, and bias-dependent microwave transmission spectroscopy in the presence of controlled nanoscale disorder introduced through helium-ion irradiation, we distinguish local instability-driven processes from intrinsic superconducting depairing and kinetic inductance nonlinearities. This approach enables systematic tuning of kinetic inductance, depairing currents, microwave dissipation, and mode structure within a single device. Bias- and temperature-dependent resonance shifts quantify disorder-induced modifications of the superconducting density of states through the nonlinear kinetic inductance, while the emergence of multiple resonant modes reveals the formation of electrodynamically distinct superconducting regions. Comparing depairing under current, field, and temperature isolates the dominant microwave loss mechanisms, separating vortex, quasiparticle, and two-level-system contributions, thus providing a robust multifunctional foundation for disorder engineering of superconducting nanowire detectors and resonators.
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https://arxiv.org/abs/2601.23277
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59feb8cf41bca076e58b03dd9325d01a4dfffb64daf321ac04a3e55126907572
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2026-02-02T00:00:00-05:00
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Robust multiparameter estimation using quantum scrambling
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arXiv:2601.23283v1 Announce Type: new Abstract: We propose and analyze a versatile and efficient multiparameter quantum sensing protocol, which simultaneously estimates many non-commuting and time-dependent signals that are coherently or incoherently coupled to sensing particles. Even in the presence of control imperfections and readout errors, our approach can detect exponentially many parameters in the system size while maintaining the optimal scaling of sensitivity. To accomplish this, scrambling dynamics are leveraged to map distinct signals to unique patterns of bitstring measurements, which distinguishes a large number of signals without significant sensitivity loss. Based on this principle, we develop a computationally efficient protocol utilizing random global Clifford unitaries and evaluate its performance both analytically and numerically. Our protocol naturally extends to scrambling dynamics generated by random local Clifford circuits, local random unitary circuits (RUCs), and ergodic Hamiltonian evolution--commonly realized in near-term quantum hardware--and opens the door to applications ranging from precise noise benchmarking of quantum dynamics to learning time-dependent Hamiltonians.
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https://arxiv.org/abs/2601.23283
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Academic Papers
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5c32b86d9ac19f29cc972cd4be4d685b76be7955b11629b8f86407f59619820f
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2026-02-02T00:00:00-05:00
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Evolution of Vortex Strings after a Thermal Quench in a Holographic Superfluid
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arXiv:2601.14328v1 Announce Type: cross Abstract: The formation of topological defects during continuous phase transitions exhibits nonequilibrium universality. While the Kibble-Zurek mechanism (KZM) predicts universal scaling of point-like defect numbers under slow driving, the statistical properties of extended defects remain largely unexplored across both slow and fast protocols. We investigate vortex string formation in a three-dimensional holographic superfluid. For slow quenches, the vortex string number follows KZM scaling, while for rapid quenches, it exhibits complementary universal scaling governed by the final temperature. Beyond the vortex string number, the loop-length distribution reveals a richer structure: individual loops follow the first-return statistics of three-dimensional random walks, $P(\ell) \sim \ell^{-5/2}$. While the total vortex length distribution remains Gaussian, its cumulants obey universal scaling laws with varying power-law exponents, and thus differ markedly from those observed in point-defect systems, indicating distinct statistical features of extended topological defects.
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https://arxiv.org/abs/2601.14328
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859146a31e6db3b613ee1aab9de8b95718a578a2737afcd6cc4749a8b4b94af3
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2026-02-02T00:00:00-05:00
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Andreev spin qubits based on the helical edge states of magnetically doped two-dimensional topological insulators
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arXiv:2601.22226v1 Announce Type: cross Abstract: We show that Andreev spin qubits can be realized in a Josephson junction based on the helical edge states of a two-dimensional topological insulator (quantum spin Hall system) proximized by superconducting films, in the presence of magnetic doping. We demonstrate that the electrical dipole transitions between the Andreev spin states induced by the magnetic doping can be harnessed to optically manipulate the Andreev spin qubit by microwave radiation pulses. We numerically simulate the realization of NOT and Hadamard quantum logic gates, and discuss implementations in realistic setups.
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https://arxiv.org/abs/2601.22226
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ca9d6a9cae1c1693f96b48268c1d8ff099af0efe85d60e1ec40f893d36c5dcf8
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2026-02-02T00:00:00-05:00
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Photon-graviton polarization entanglement induced by a classical electromagnetic wave
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arXiv:2601.22332v1 Announce Type: cross Abstract: We study the photon-graviton pair production induced by the propagation of a classical electromagnetic (EM) wave in a Minkowskian spacetime. In our model, the gravitational field is described in terms of the quantized graviton field, whereas the electromagnetic field is split into a classical drive (a linearly or circularly polarized electromagnetic wave) and a quantum fluctuation field. We analyze the time evolution of the quantum state showing that, among other outcomes, the propagation of the EM wave can generate Bell states in the photon-graviton polarization basis. We finally discuss the possibility to observe entangled photons in artificial and natural scenarios.
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https://arxiv.org/abs/2601.22332
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ef60175e6839198a6a054222cda09db85f3c1726606ce20390083d16d3652dbb
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2026-02-02T00:00:00-05:00
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Non-Equilibrium Quantum Many-Body Physics with Quantum Circuits
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arXiv:2601.22375v1 Announce Type: cross Abstract: These are the notes for the 4.5-hour course with the same title that I delivered in August 2025 at the Les Houches summer school ``Exact Solvability and Quantum Information''. In these notes I pedagogically introduce the setting of brickwork quantum circuits and show that it provides a useful framework to study non-equilibrium quantum many-body dynamics in the presence of local interactions. I first show that brickwork quantum circuits evolve quantum correlations in a way that is fundamentally similar to local Hamiltonians, and then present examples of brickwork quantum circuits where, surprisingly, one can compute exactly several relevant dynamical and spectral properties in the presence of non-trivial interactions.
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https://arxiv.org/abs/2601.22375
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f9718477362317b2ce5746d4da535d948511fdf396a2981bcc7fa1804bde207a
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2026-02-02T00:00:00-05:00
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A novel Hamiltonian formulation of $1+1$ dimensional $\phi^4$ theory in Daubechies wavelet basis: momentum space analysis
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arXiv:2601.22953v1 Announce Type: cross Abstract: We employ the wavelet formalism of quantum field theory to study field theories in the nonperturbative Hamiltonian framework. Specifically, we make use of Daubechies wavelets in momentum space. These basis elements are characterised by a resolution and a translation index that provides for a natural nonperturbative infrared and ultraviolet truncation of the quantum field theory. As an application, we consider the $\phi^4$ theory and demonstrate the emergence of the well-known nonperturbative strong-coupling phase transition in the $m^2>0$ sector.
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https://arxiv.org/abs/2601.22953
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0ec392e2386be6e93eb0b3e71bff4aaf92f457993f73617507b51e058be69274
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2026-02-02T00:00:00-05:00
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Quasiperiodic Skin Criticality in an Exactly Solvable Non-Hermitian Quasicrystal
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arXiv:2601.23015v1 Announce Type: cross Abstract: Critical states in quasiperiodic systems defy the conventional dichotomy between extended and localized states. In this work, we demonstrate that non-Hermiticity fundamentally reshapes this paradigm by giving rise to an exactly solvable quasiperiodic critical phase with no energy selectivity. We introduce a non-Hermitian quasiperiodic lattice based on a modulated Hatano-Nelson model and uncover a new universality class of quasiperiodic skin criticality, in which all eigenstates share an identical multifractal spatial structure. Through a nonunitary gauge transformation, the system is mapped onto a disorder-free lattice, enabling exact analytical solutions for the full spectrum and eigenstates. As a consequence, the inverse participation ratio is strictly energy-independent and controlled solely by a global phase. We further show that this criticality persists in multiband lattices, establishing a general and analytically controlled framework for non-Hermitian quasiperiodic critical phenomena.
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https://arxiv.org/abs/2601.23015
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c09870ff7e3d8830a18dc7c02ce9d25ae875637aa75cf23cc25aa71ab2fcc894
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2026-02-02T00:00:00-05:00
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Entanglement Hamiltonians in dissipative free fermions and the time-dependent GGE
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arXiv:2601.23234v1 Announce Type: cross Abstract: We investigate the dynamics of Entanglement Hamiltonians (EHs) in dissipative free-fermionic systems using a recent operator-based formulation of the quasiparticle picture. Focusing on gain and loss dissipation, we study the post-quench evolution and derive explicit expressions for the EH at the ballistic scale. In the long-time and weak-dissipation regime, the EH is shown to take the form of a time-dependent Generalized Gibbs Ensemble (t-GGE), with a structure that is universal across different initial states of the quench protocol. Within this framework, the emergence of the t-GGE is fully accounted for by the quasiparticle picture, and we argue that this description remains valid whenever the Lindbladian admits an appropriate coarse-grained representation.
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https://arxiv.org/abs/2601.23234
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79ea2bdb9902b95cf525feeadb62f0fa851cc99a8bd4bbf5fe622a0e7fe7aa3a
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2026-02-02T00:00:00-05:00
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Weight-four parity checks with silicon spin qubits
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arXiv:2601.23267v1 Announce Type: cross Abstract: Recent advances in coherent spin shuttling have made sparse semiconductor spin qubit arrays an appealing solid-state platform to realize quantum processors. The dynamic and long-range connectivity enabled by shuttling is also essential for many quantum error-correction (QEC) schemes. Here, we demonstrate a silicon spin-qubit device that comprises a shuttling bus for coherently transporting qubits that can interact at four isolated locations we call bus stops. We dynamically populate the array and tune all single- and two-qubit operations using shuttling and quantum non-demolition (QND) spin measurements, without access to charge sensing in most of the device. We achieve universal control of the effective five-qubit processor and select the connectivity required to form a surface-code stabilizer plaquette that supports X- and Z-type parity checks up to weight-four. We use the parity checks to generate multi-qubit entanglement between all qubit combinations in the array and report the genuine entanglement of a five-qubit Greenberger-Horne-Zeilinger (GHZ) state, constituting the largest such state ever constructed with gate-defined semiconductor spins. This work opens immediate opportunities to pursue QEC experiments with spin qubits, and the protocols developed here lay the groundwork for the modular calibration and operation of sparse spin qubit arrays.
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https://arxiv.org/abs/2601.23267
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Academic Papers
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362f5a6182f54fcfa0eb7ae50be7d2774c47ec3949744be30c9a990307dbb183
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2026-02-02T00:00:00-05:00
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Analytical topological invariants for 2D non-Hermitian phases using Morse theory
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arXiv:2601.23272v1 Announce Type: cross Abstract: As energy dissipation and gain are ubiquitous in the real world, such phenomena demand the generalization of Hermitian methods such as the analysis of topological properties for non-Hermitian systems. However, as non-Hermitian systems typically contain more degrees of freedom, this poses a challenge for analytical approaches to understand their topology and invariants. In this work, we analytically calculate the 2D Zak phase for a 2D non-Hermitian SSH-type Hamiltonian that supports a rich structure and edge currents. Closed-form expressions for eigenstates and divisions of the phase diagram are obtained, including for regions in the phase diagram where different types of exceptional points exist. We use Morse theory to determine the topology of exceptional points in momentum space. Although the band structure breaks down at exceptional points, we show that a specific phase-based topological invariant remains well-defined. Furthermore, our work yields an analytic derivation for counting edge states in the Hermitian limit. These results provide new conceptual and analytical tools for the study of complex topological systems.
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https://arxiv.org/abs/2601.23272
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Academic Papers
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c9ed56f1e03b0af5a2337645bbd948d70bb0450bfda39dcb93bad72b40c33ef1
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2026-02-02T00:00:00-05:00
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Sampling quantum states with inequality constraints
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arXiv:2109.14215v2 Announce Type: replace Abstract: Random samples of quantum states with specific properties are useful for various applications, such as Monte Carlo integration over the state space. In the high-dimensional situations that one encounters already for a few qubits, the quantum state space has a very complicated boundary, and it is challenging to incorporate the specific properties into the sampling algorithm. In this paper, we present the Sequentially Constrained Monte Carlo (SCMC) algorithm as a powerful and versatile method for sampling quantum states in accordance with any desired properties that can be stated as inequalities. We apply the SCMC algorithm to the generation of samples of bound entangled states; for example, we obtain nearly ten thousand bound entangled two-qutrit states in a few minutes -- a colossal speed-up over independence sampling, which yields less than ten such states per day. In the second application, we draw samples of high-dimensional quantum states from a narrowly peaked target distribution and observe that SCMC sampling remains efficient as the dimension grows. In yet another application, the SCMC algorithm produces uniformly distributed quantum states in regions bounded by values of the problem-specific target distribution; such samples are needed when estimating parameters from the probabilistic data acquired in quantum experiments.
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https://arxiv.org/abs/2109.14215
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1c08bbef26d62d043e855cf21be466da3330592aa0c3971287197798de098a60
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2026-02-02T00:00:00-05:00
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On Certified Randomness from Fourier Sampling or Random Circuit Sampling
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arXiv:2111.14846v3 Announce Type: replace Abstract: Certified randomness has a long history in quantum information, with many potential applications. Recently Aaronson (2018, 2020) proposed a novel public certified randomness protocol based on existing random circuit sampling (RCS) experiments. The security of his protocol, however, relies on non-standard complexity-theoretic conjectures which were not previously studied in the literature. Inspired by Aaronson's work, we study certified randomness in the quantum random oracle model (QROM). We show that quantum Fourier Sampling can be used to define a publicly verifiable certified randomness protocol with black-box security without any computational assumptions. In addition to giving a certified randomness protocol in the QROM, our work can also be seen as supporting Aaronson's conjectures for RCS-based randomness generation, as our protocol is in some sense the "black-box version" of Aaronson's protocol. In further support of Aaronson's proposal, we prove a Fourier Sampling version of Aaronson's conjecture by extending Raz and Tal's separation of BQP vs PH. Our work complements the subsequent certified randomness protocol of Yamakawa and Zhandry (2022) in the QROM. Whereas the security of that protocol relied on the Aaronson-Ambainis conjecture, ours does not rely on any computational assumption - at the expense of requiring exponential-time classical verification. Our protocol also has a simple heuristic implementation.
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https://arxiv.org/abs/2111.14846
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b1d253241c0bb675b98afca71f117a93aa8859554297a0e42d347030ea00924b
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2026-02-02T00:00:00-05:00
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Quantum-enhanced metrology with large Fock states
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arXiv:2306.16919v2 Announce Type: replace Abstract: Quantum metrology uses non-classical states, such as Fock states with a specific number of photons, to achieve an advantage over classical sensing methods. Typically, quantum metrological performance can be enhanced by increasing the involved excitation numbers, for example, by using large photon-number Fock states. However, manipulating these states and demonstrating a quantum metrological advantage is experimentally challenging. Here we present an efficient method for generating large Fock states approaching 100 photons within a superconducting microwave cavity through the development of a programmable photon number filter. Using these states in displacement and phase measurements, we demonstrate quantum-enhanced metrology approaching the Heisenberg scaling for 40-photon Fock states and achieve a maximum metrological gain of up to 14.8 dB, highlighting the metrological advantages of large Fock states. Our study could be readily extended to mechanical and optical systems, promising potential applications in weak force detection and dark matter searches.
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https://arxiv.org/abs/2306.16919
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3635294f42b6e76c5fc3b446bade0a6aedd3762f4f23caeb275316940e838e4d
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2026-02-02T00:00:00-05:00
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Generative quantum machine learning via denoising diffusion probabilistic models
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arXiv:2310.05866v5 Announce Type: replace Abstract: Deep generative models are key-enabling technology to computer vision, text generation, and large language models. Denoising diffusion probabilistic models (DDPMs) have recently gained much attention due to their ability to generate diverse and high-quality samples in many computer vision tasks, as well as to incorporate flexible model architectures and a relatively simple training scheme. Quantum generative models, empowered by entanglement and superposition, have brought new insight to learning classical and quantum data. Inspired by the classical counterpart, we propose the quantum denoising diffusion probabilistic model (QuDDPM) to enable efficiently trainable generative learning of quantum data. QuDDPM adopts sufficient layers of circuits to guarantee expressivity, while it introduces multiple intermediate training tasks as interpolation between the target distribution and noise to avoid barren plateau and guarantee efficient training. We provide bounds on the learning error and demonstrate QuDDPM's capability in learning correlated quantum noise model, quantum many-body phases, and topological structure of quantum data. The results provide a paradigm for versatile and efficient quantum generative learning.
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https://arxiv.org/abs/2310.05866
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30e78caeb73a223fd3a2c21408795858653c4c98cd88d4013d605fb99628724b
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2026-02-02T00:00:00-05:00
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Floquet-Thermalization via Instantons near Dynamical Freezing
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arXiv:2412.10498v2 Announce Type: replace Abstract: Periodically driven Floquet quantum many-body systems have revealed new insights into the rich interplay of thermalization, and growth of entanglement. The phenomenology of dynamical freezing, whereby a translationally invariant many-body system exhibits emergent conservation laws and a slow growth of entanglement entropy at certain fixed ratios of a drive amplitude and frequency, presents a novel paradigm for retaining memory of an initial state upto late times. Previous studies of dynamical freezing have largely been restricted to a high-frequency Floquet-Magnus expansion, and numerical exact diagonalization, which are unable to capture the slow approach to thermalization (or lack thereof) in a systematic fashion. By employing Floquet flow-renormalization, where the time-dependent part of the Hamiltonian is gradually decoupled from the effective Hamiltonian using a sequence of unitary transformations, we unveil the universal approach to dynamical freezing and beyond, at asymptotically late times. We analyze the fixed-point behavior associated with the flow-renormalization at and near freezing using both exact-diagonalization and tensor-network based methods, and contrast the results with conventional prethermal phenomenon. For a generic non-integrable spin Hamiltonian with a periodic cosine wave drive, the flow approaches an unstable fixed point with an approximate emergent symmetry. We observe that at freezing the thermalization timescales are delayed compared to away from freezing, and the flow trajectory undergoes a series of instanton events. Our numerical results are supported by analytical solutions to the flow equations.
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https://arxiv.org/abs/2412.10498
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859df349c0e42d30939df97090a168031c8ad645cb660bab338ede5b60e65bf3
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2026-02-02T00:00:00-05:00
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Quantum Circuit Optimization by Graph Coloring
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arXiv:2501.14447v2 Announce Type: replace Abstract: This work shows that minimizing the depth of a quantum circuit composed of commuting operations reduces to a vertex coloring problem on an appropriately constructed graph, where gates correspond to vertices and edges encode non-parallelizability. The reduction leads to algorithms for circuit optimization by adopting any vertex coloring solver as an optimization backend. The approach is validated by numerical experiments as well as applications to known quantum circuits, including finite field multiplication and QFT-based addition.
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https://arxiv.org/abs/2501.14447
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d76571fb4f09209bef1b9ed7bdc57abde82f019fe1c50751755a1745adef0bb1
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2026-02-02T00:00:00-05:00
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Efficient Magic State Cultivation on the Surface Code
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arXiv:2502.01743v4 Announce Type: replace Abstract: Magic state cultivation is a leading approach for generating the resource states required for fault-tolerant quantum computation. Here we present a new cultivation protocol that increases the success probability of magic-state generation in platforms with flexible and non-local connectivity. Our method implements cultivation directly on the surface code, avoiding the detour through alternative, less efficient error-correcting codes used in prior approaches. This both improves the acceptance rate and preserves compatibility with the geometry of the code and the hardware. Numerical simulations show that our protocols improve success probabilities and reduce output error rates compared with protocols tailored to locally connected platforms. Under realistic noise models for cold-atom and trapped-ion systems, we improve the rate of magic state generation by more than a factor of 20. Finally, we study qubit loss and erasure, and show that very low error rates can be achieved with minimal overhead, reaching below $10^{-6}$ infidelity using only nine physical erasure qubits.
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https://arxiv.org/abs/2502.01743
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4786f168a2da6738287598547b1b53a82c176c6655f1fcceef488db7f3482a2b
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2026-02-02T00:00:00-05:00
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Provable and Verifiable Quantum Advantage in Sample Complexity
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arXiv:2502.08721v3 Announce Type: replace Abstract: Consider a fixed universe of $N=2^n$ elements and the uniform distribution over elements of some subset of size $K$. Given samples from this distribution, the task of complement sampling is to provide a sample from the complementary subset. We give a simple quantum algorithm that uses only a single quantum sample -- a single copy of the uniform superposition over elements of the subset. When $K=N/2$, we show that the quantum algorithm succeeds with probability $1$, whereas any classical algorithm that succeeds with bounded probability of error requires a number of samples of the order of $N$. This shows that in a sample-to-sample setting, quantum computation can achieve the largest possible separation over classical computation. We show that the same bound can be lifted to prove average-case hardness, paving the way for demonstrations on noisy intermediate-scale quantum (NISQ) computers. It follows that under the assumption of the existence of one-way functions, complement sampling gives provable, verifiable and NISQable quantum advantage in a sample complexity setting.
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https://arxiv.org/abs/2502.08721
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058a68d40d280fa6a2f3e134ae942213e3e2e892a1bbe9c184b038810de5c384
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2026-02-02T00:00:00-05:00
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Digital Quantum Simulation of the Lindblad Master Equation and Its Nonlinear Extensions via Quantum Trajectory Averaging
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arXiv:2504.00121v2 Announce Type: replace Abstract: Since precisely controlling dissipation in realistic environments is challenging, digital simulation of the Lindblad master equation (LME) is of great significance for understanding nonequilibrium dynamics in open quantum systems. However, achieving long-time simulations for complex systems with multiple dissipation channels remains a major challenge, both theoretically and experimentally. Here, we propose a 1-dilation digital scheme for simulating the LME based on quantum trajectory averaging without postselection. By rigorously matching the stochasticity inherent in quantum trajectories with the probabilistic outcomes of quantum measurements, our method effectively translates the classically established quantum jump algorithm into executable quantum circuits. A key advantage of our method is that it overcomes the exponential suppression of success probability seen in some existing postselection-dependent schemes, especially for long-time evolution or systems with numerous jump operators. Moreover, the scheme can be extended to a 2-dilation framework for the nonlinear LME with postselection, bridging the full LME and non-Hermitian Hamiltonian dynamics. This extended scheme provides a digital approach for exploring the interplay between non-Hermitian Hamiltonians and dissipative terms within a monitored quantum dynamics framework.
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https://arxiv.org/abs/2504.00121
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Academic Papers
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9e3b6efc7cfc797ce8c508cb88785deaf02675ae7999b6782bc4bc9c094af036
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2026-02-02T00:00:00-05:00
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Cryogenic rf-to-microwave transducer based on a dc-biased electromechanical system
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arXiv:2508.01066v3 Announce Type: replace Abstract: We report a two-stage, heterodyne rf-to-microwave transducer that combines a tunable electrostatic pre-amplifier with a superconducting electromechanical cavity. A metalized Si$_3$N$_4$ membrane (3 MHz frequency) forms the movable plate of a vacuum-gap capacitor in a microwave LC resonator. A dc bias across the gap converts any small rf signal into a resonant electrostatic force proportional to the bias, providing a voltage-controlled gain that multiplies the cavity's intrinsic electromechanical gain. In a flip-chip device with a 1.5 $\mathrm{\mu}$m gap operated at 10 mK we observe dc-tunable anti-spring shifts, and rf-to-microwave transduction at 49 V bias, achieving a charge sensitivity of 87 $\mathrm{\mu}$e/$\sqrt{\mathrm{Hz}}$ (0.9 nV/$\sqrt{\mathrm{Hz}}$). Extrapolation to sub-micron gaps and state-of-the-art $Q>10^8$ membrane resonators predicts sub-200 fV/$\sqrt{\mathrm{Hz}}$ sensitivity, establishing dc-biased electromechanics as a practical route towards quantum-grade rf electrometers and low-noise modular heterodyne links for superconducting microwave circuits and charge or voltage sensing.
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https://arxiv.org/abs/2508.01066
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Academic Papers
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07bc47a4cefeb8b83e101b262804b70a35737fad04ba0925cf3590fbc2d24616
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2026-02-02T00:00:00-05:00
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Conditional squeezing induced by a two-level system: a first-principles approach to QND readout
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arXiv:2508.03506v4 Announce Type: replace Abstract: We present a systematic Magnus expansion treatment of light-matter interaction beyond the Rotating Wave Approximation. We show that at the second order of Magnus series, the time-evolution operator acquires both energy-shifts and squeezing contributions. In addition to the energy shifts caused by vacuum and photon numbers, the second-order evolution operator contains a term that induces conditional squeezing of the field mode depending on the state of the atom. Such a term suggests a natural mechanism for phase-sensitive, quantum non-demolishing type measurements of squeezed light via homodyne detection. We also show that the second-order Magnus operator in a close SU(1,1) algebra, ensuring the exponentiation of the Magnus series yields a well-defined unitary evolution. By deriving squeezing directly from the Jaynes-Cummings Hamiltonian, our results clarify how energy shifts and $\hat{\sigma}$-dependent squeezing arise from an SU(1,1) structure, with direct implications for phase-sensitive and quantum nondemolition measurements.
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https://arxiv.org/abs/2508.03506
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Academic Papers
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a91591e56055677957a2ce6ae9b1ba6dc3581868d9b743bf9d6b73b757a894f9
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2026-02-02T00:00:00-05:00
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State-adaptive quantum error correction and fault-tolerant quantum computing
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arXiv:2508.06011v2 Announce Type: replace Abstract: We present a theoretical framework for state-adaptive quantum error correction that bridges the gap between quantum computing and error correction paradigms. By incorporating knowledge of quantum states into the error correction process, we establish a new capacity regime governed by quantum mutual information rather than coherent information. This approach reveals a fundamental connection to entanglement-assisted protocols. We demonstrate practical applications in fault-tolerant quantum computation, showing how state-adaptivity enables enhanced error correction without additional measurement overhead. The framework provides insights into quantum channel capacities while offering implementation advantages for current quantum computing platforms.
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https://arxiv.org/abs/2508.06011
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Academic Papers
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5fcf538b3c734f20ae8deec19a87b52b96994daadcf0b0bb438f161b879a6b47
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2026-02-02T00:00:00-05:00
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Carrier-Assisted Entanglement Purification
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arXiv:2509.07514v2 Announce Type: replace Abstract: Entanglement distillation, a fundamental building block of quantum networks, enables the purification of noisy entangled states shared among distant nodes by local operations and classical communication. Its practical realization presents several technical challenges, including the storage of quantum states in quantum memory and the execution of coherent quantum operations on multiple copies of states within the quantum memory. In this work, we present an entanglement purification protocol via quantum communication, namely a carrier-assisted entanglement purification protocol, which utilizes two elements only: i) quantum memory for a single-copy entangled state shared by parties and ii) single qubits travelling between parties. We show that the protocol, when single-qubit transmission is noiseless, can purify a noisy entangled state shared by parties. When single-qubit transmission is noisy, the purification relies on types of noisy qubit channels; we characterize Pauli channels such that the protocol works for the purification. We address this limitation by using multiple carrier qubits, and show that for any depolarizing channel with channel fidelity greater than 1/2, the protocol's fixed-point fidelity approaches unity as the number of carrier increases. Our results significantly reduce the experimental overhead needed for distilling entanglement, such as quantum memory and coherent operations, making long-distance pure entanglement closer to a practical realization.
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https://arxiv.org/abs/2509.07514
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Academic Papers
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c4dbf7e2ebb846a4df9c45a2dba2555558086b3dc2faebd91caca71f7efb947e
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2026-02-02T00:00:00-05:00
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Addressing requirements for crosstalk-free quantum-gate operation in many-body nanofiber cavity QED systems
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arXiv:2509.08408v2 Announce Type: replace Abstract: A distributed network architecture in which flying photons connect individual modules containing stationary atomic qubits is a promising approach for scaling up neutral-atom based quantum-computing platforms. We consider an all-fiber based platform consisting of nanofiber cavity QED systems interconnected via conventional optical fibers. Each nanofiber cavity is strongly coupled to multiple atoms through its evanescent field, and atom pairs within one cavity (local) or two distant cavities (remote) are addressed for performing photon-mediated quantum logic gates on them by controlling the effective light-matter coupling via local AC Stark shifts and atom-fiber distance. We numerically evaluate the required parameters for achieving nearly crosstalk-free gate operation using these targeting methods by calculating average gate fidelities, success probabilities, and Pauli error rates for both local and remote controlled-Z gates. For the case of perfect addressing, we also analytically determine the theoretical optimum gate performance as limited by cavity reflectivity, cooperativity, and qubit level-splitting.
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https://arxiv.org/abs/2509.08408
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Academic Papers
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e3f25cf5f482aa33fa0e2f7d99e0f47cc3a190b59ab16c8d8c5f1b0557ac41f5
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2026-02-02T00:00:00-05:00
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Quantum Simulation of Fermions in $AdS_2$ Black Hole: Chirality, Entanglement, and Spectral Crossovers
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arXiv:2509.21410v2 Announce Type: replace Abstract: We consider free Dirac fermions on a discretized $AdS_2$ black hole background, and analyze how curved space redshift, horizons, and the spin connection induced chiral gravitational effect shape spectral, transport, and scrambling phenomena. The system is discretized via staggered fermions followed by the Jordan-Wigner transform to encode the model in qubit degrees of freedom, whose Hamiltonian carries site dependent warp factors and bond chirality terms encoding the redshift and spin connection effects. We calculate the ground state and first excited states energies, their local charge profiles, and their half-chain entanglement entropies, showing how redshift and chirality affect the transition from criticality to a gapped regime. Probing operator growth via out-of-time-order correlators, we find that horizons and the chiral coupling accelerate scrambling, yet remain within a non-chaotic regime. Finally, we map out an integrable to ergodic crossover via level-spacing statistics and Brody fits, and introduce on-site disorder to drive a many body localization transition.
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https://arxiv.org/abs/2509.21410
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Academic Papers
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b0e0787751743978c2e3664d994156c7bfd2884cc521cf2d20d9c2651aaeccf2
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2026-02-02T00:00:00-05:00
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Software-enhanced simultaneous quantum-classical communication protocol with Gaussian post-selection
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arXiv:2510.13138v2 Announce Type: replace Abstract: Simultaneous quantum-classical communication (SQCC) protocols offer a practical approach to continuous-variable quantum key distribution (CV-QKD) by encoding quantum and classical signals onto the same optical pulse. However, like most QKD protocols, their performance is limited when experimental parameters, such as modulation variance, are optimised based on stationary channel assumptions. In fluctuating environments, such as free-space links, this can result in sub-optimal key rates and reduced transmission distances. In this work, we introduce Gaussian post-selection into the SQCC framework, enabling a software-based optimisation of the modulation variance after channel estimation. This passive approach enhances key rates in both asymptotic and finite-size regimes without requiring hardware modifications and remains effective even when receiver imperfections are taken into account. We demonstrate that our protocol improves the transmission distance and robustness of SQCC relative to the standard fixed-variance SQCC protocol, and approaches the performance of a fully pre-optimised system across both fibre and free-space channels. In particular, we show that the protocol enables full communication windows under ideal weather conditions and maintains higher duty cycles during adverse weather in satellite-to-ground scenarios. These results highlight the practicality of post-selection based SQCC for real-world quantum communication over both terrestrial fibre networks and satellite-based free-space links.
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https://arxiv.org/abs/2510.13138
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Academic Papers
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b9361b015f7bd5186c94e9a30eac089f63890291bffcfd17085fdd61bfc71eae
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2026-02-02T00:00:00-05:00
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Temporal Entanglement Transitions in the Periodically Driven Ising Chain
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arXiv:2510.13970v2 Announce Type: replace Abstract: Periodically driven quantum systems can host non-equilibrium phenomena without static analogs, including in their entanglement dynamics. Here, we discover $temporal$ $entanglement$ $transitions$ (TET) in a Floquet spin chain, which correspond to a quantum phase transition in the spectrum of the entanglement Hamiltonian and are signaled by dynamical spontaneous symmetry breaking. We identify the symmetry principles underlying these transitions: they appear when the driven Hamiltonian preserves global symmetry (here, $\mathbb{Z}_2$), the initial state respects this symmetry, and the reduced density matrix carries weight in both subsystem-parity sectors, with TET occurring precisely when the sector weights become equal (given the previous two conditions are also satisfied). Intriguingly, we find these transitions across a broad range of driving frequencies (from adiabatic to high-frequency regime) and independently of drive details, where they manifest as periodic, sharp entanglement spectrum reorganizations marked by the Schmidt-gap closure, a vanishing entanglement echo, and symmetry-quantum-number flips, while remaining invisible to conventional local observables. At high frequencies, the entanglement Hamiltonian acquires an intrinsic timescale decoupled from the drive period, rendering the transitions genuine steady-state features. Finite-size scaling reveals universal critical behavior with correlation-length exponent $\nu=1$, matching equilibrium Ising universality despite its emergence from purely dynamical mechanisms decoupled from static criticality. Our work establishes TET as novel features in Floquet quantum matter.
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https://arxiv.org/abs/2510.13970
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Academic Papers
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c2ed74e075c57d58de9c6c6585d92d97e2cc58067a863444885273958ccdd4d6
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2026-02-02T00:00:00-05:00
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Single-shot antidistinguishability of unitary operations
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arXiv:2510.14609v2 Announce Type: replace Abstract: The notion of antidistinguishability captures the possibility of ruling out certain alternatives in a quantum experiment without identifying the actual outcome. Although extensively studied for quantum states, the antidistinguishability of quantum channels remains largely unexplored. In this work, we investigate the single-shot antidistinguishability of unitary operations. We analyse two scenarios: antidistinguishability with single-system probes and with entangled probes. For sets of three unitaries, we first prove that all maximally entangled states are equivalent in their performance as probe. In the qubit case, we further establish that maximally entangled probes are always sufficient: if a set of three qubit unitaries is antidistinguishable with either a single-system or non-maximally entangled probe, then it is also antidistinguishable with a maximally entangled one. However, in higher dimension, this equivalence fails. In \textit{dimension 3}, there exists a set of unitaries that are antidistinguishable with non-maximally entangled probe or single-system probe but not with maximally entangled probe. We also establish that union of two antidistinguishable sets of three qubit unitaries also forms a set of antidistinguishable unitaries. Lastly, we provide methods to construct antidistinguishable unitaries from non-antidistinguishable ones.
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https://arxiv.org/abs/2510.14609
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Academic Papers
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cb7c80470f168db2a9503b911cf051636a544195a360fc22aa17e76603888fab
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2026-02-02T00:00:00-05:00
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Generalized Heralded Generation of Non-Gaussian States Using an Optical Parametric Amplifier
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arXiv:2511.20946v2 Announce Type: replace Abstract: The heralded optical parametric amplifier (OPA) has emerged as a promising tool for quantum state engineering. However, its potential has been limited to coherent state inputs. Here, we introduce a generalized heralded OPA protocol that unlocks a vastly expanded class of quantum phenomena by accepting arbitrary non-classical inputs. With a squeezed vacuum input, the setup functions as an integrated two-photon subtractor, deterministically generating high-fidelity, larger-amplitude squeezed Schr\"odinger cat states -- an operation previously requiring complex, discrete setups. Furthermore, when fed a small-amplitude SC state, the protocol acts as a non-Gaussianity amplifier, distilling it into high-purity approximations of key quantum resources like specific photon-number superpositions. This work transforms the OPA from a specialized source into a versatile and practical platform for advanced quantum state engineering, enabling the generation of a wide array of non-Gaussian states from a single, integrated setup.
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https://arxiv.org/abs/2511.20946
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Academic Papers
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227209c9e9fba8d2812d6882cef638ef387908197614946d8f38f8713fe9bf62
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2026-02-02T00:00:00-05:00
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Factorisation conditions and causality for local measurements in QFT
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arXiv:2511.21644v2 Announce Type: replace Abstract: Quantum operations that are perfectly admissible in non-relativistic quantum theory can enable signalling between spacelike separated regions when naively imported into quantum field theory (QFT). Prominent examples of such "impossible measurements", in the sense of Sorkin, include certain unitary kicks and projective measurements. It is generally accepted that only those quantum operations whose physical implementation arises from a fully relativistically covariant interaction, between the quantum field and a suitable probe, should be regarded as admissible. While this idea has been realised at the level of abstract algebraic QFT, or via particular measurement models, there is still no general set of operational criteria characterising which measurements are physically implementable. In this work we adopt the local S-matrix formalism, and make use of a hierarchy of factorisation conditions that exclude both superluminal signalling and retrocausality, thereby providing such a criterion. Realising the local S-matrices through explicit interactions between smeared field operators and a pointer degree of freedom, we further derive local causality conditions for the induced Kraus operators, which guarantee the absence of signalling in "impossible measurement" scenarios. Finally, we show that the accuracy with which local field observables can be measured is fundamentally limited by the retarded propagator of the field, which also plays an essential role in a factorisation identity we prove for the field Kraus operators.
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https://arxiv.org/abs/2511.21644
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Academic Papers
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8fb1b20d7479026240d7aa56fa1f9994761f89e7ca80f6accb2595efb5330d9b
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2026-02-02T00:00:00-05:00
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Pauli Propagation for Imaginary-Time Evolution
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arXiv:2601.14400v2 Announce Type: replace Abstract: We extend the Pauli Propagation framework to simulate imaginary-time evolution. By deriving explicit update rules for the propagation of Pauli operators under imaginary-time evolution generated by Pauli strings, we introduce an imaginary-time Pauli Propagation (ITPP) algorithm for approximating imaginary-time dynamics directly in the Pauli basis. This approach enables the computation of thermal and ground-state properties while retaining the key computational advantages of Pauli Propagation. Benchmarking ITPP on the one-dimensional transverse-field Ising model demonstrates that truncation provides a controlled trade-off between accuracy and computational cost, while also revealing challenges associated with operator growth under imaginary-time evolution. Finally, combining imaginary-time and real-time Pauli Propagation naturally suggests a pathway toward simulating open quantum system dynamics within a unified framework.
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https://arxiv.org/abs/2601.14400
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Academic Papers
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055acf3395eac8b308733438dfaf97368a36259ce0a7bddfa45fb6d76c3199b5
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2026-02-02T00:00:00-05:00
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Quantum Super-resolution by Adaptive Non-local Observables
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arXiv:2601.14433v2 Announce Type: replace Abstract: Super-resolution (SR) seeks to reconstruct high-resolution (HR) data from low-resolution (LR) observations. Classical deep learning methods have advanced SR substantially, but require increasingly deeper networks, large datasets, and heavy computation to capture fine-grained correlations. In this work, we present the \emph{first study} to investigate quantum circuits for SR. We propose a framework based on Variational Quantum Circuits (VQCs) with \emph{Adaptive Non-Local Observable} (ANO) measurements. Unlike conventional VQCs with fixed Pauli readouts, ANO introduces trainable multi-qubit Hermitian observables, allowing the measurement process to adapt during training. This design leverages the high-dimensional Hilbert space of quantum systems and the representational structure provided by entanglement and superposition. Experiments demonstrate that ANO-VQCs achieve up to five-fold higher resolution with a relatively small model size, suggesting a promising new direction at the intersection of quantum machine learning and super-resolution.
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https://arxiv.org/abs/2601.14433
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Academic Papers
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47252749efb5496f3ae44afaf2f943dc936a45ba4d39f68a4462a03d0bd2fa49
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2026-02-02T00:00:00-05:00
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Entanglement dynamics from universal low-lying modes
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arXiv:2407.16763v3 Announce Type: replace-cross Abstract: Information-theoretic quantities such as Renyi entropies show a remarkable universality in their late-time behaviour across a variety of chaotic many-body systems. Understanding how such common features emerge from very different microscopic dynamics remains an important challenge. In this work, we address this question in a class of Brownian models with random time-dependent Hamiltonians and a variety of different microscopic couplings. In any such model, the Lorentzian time-evolution of the $n$-th Renyi entropy can be mapped to evolution by a Euclidean Hamiltonian on 2$n$ copies of the system. We provide evidence that in systems with no symmetries, the low-energy excitations of the Euclidean Hamiltonian are universally given by a gapped quasiparticle-like band. The eigenstates in this band are plane waves of locally dressed domain walls between ferromagnetic ground states associated with two permutations in the symmetric group $S_n$. These excitations give rise to the membrane picture of entanglement growth, with the membrane tension determined by their dispersion relation. We establish this structure in a variety of cases using analytical perturbative methods and numerical variational techniques, and extract the associated dispersion relations and membrane tensions for the second and third Renyi entropies. For the third Renyi entropy, we argue that phase transitions in the membrane tension as a function of velocity are needed to ensure that physical constraints on the membrane tension are satisfied. Overall, this structure provides an understanding of entanglement dynamics in terms of a universal set of gapped low-lying modes, which may also apply to systems with time-independent Hamiltonians.
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https://arxiv.org/abs/2407.16763
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Academic Papers
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6940eed280d203d2a6bd2ed8ed808e952cb7cb3fb52d2c3ecccff142c69e9e2d
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2026-02-02T00:00:00-05:00
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Measurement-Induced Crossover of Quantum Jump Statistics in Postselection-Free Many-Body Dynamics
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arXiv:2503.02418v2 Announce Type: replace-cross Abstract: We reveal a nontrivial crossover of subsystem fluctuations of quantum jumps in continuously monitored many-body systems, which have a trivial maximally mixed state as a steady-state density matrix. While the fluctuations exhibit the standard volume law $\propto L$ following Poissonian statistics for sufficiently weak measurement strength, anomalous yet universal scaling law $\propto L^\alpha \:(\alpha\sim 2.7$ up to $L=20)$ indicating super-Poissonian statistics appears for strong measurement strength. This drastically affects the precision of estimating the rate of quantum jumps: for strong (weak) measurement, the estimation uncertainty is enhanced (suppressed) as the system size increases. We demonstrate that the anomalous scaling of the subsystem fluctuation originates from an integrated many-body autocorrelation function and that the transient dynamics contributes to the scaling law rather than the Liouvillian gap. The measurement-induced crossover is accessed only from the postselection-free information obtained from the time and the position of quantum jumps and can be tested in ultracold atom experiments.
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https://arxiv.org/abs/2503.02418
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Academic Papers
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2b5c9d56c64b3fb27af800cdd5e14bcfc3b7a8c087800c45d28de578b590bdac
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2026-02-02T00:00:00-05:00
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Spin-orbit coupled spin-boson model : A variational analysis
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arXiv:2510.26468v2 Announce Type: replace-cross Abstract: The spin-boson (SB) model is a standard prototype for quantum dissipation, which we generalize in this work, to explore the dissipative effects on a one-dimensional spin-orbit (SO) coupled particle in the presence of a sub-ohmic bath. We analyze this model by extending the well-known variational polaron approach, revealing a localization transition accompanied by an intriguing change in the spectrum, for which the doubly degenerate minima evolves to a single minimum at zero momentum as the system-bath coupling increases. For translational invariant system with conserved momentum, a continuous magnetization transition occurs, whereas the ground state changes discontinuously. We further investigate the transition of the ground state in the presence of harmonic confinement, which effectively models a quantum dot-like nanostructure under the influence of the environment. In both the scenarios, the entanglement entropy of the spin-sector can serve as a marker for these transitions. Interestingly, for the trapped system, a cat-like superposition state corresponds to maximum entanglement entropy below the transition, highlighting the relevance of the present model for studying the effect of decoherence on intra-particle entanglement in the context of quantum information processing.
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https://arxiv.org/abs/2510.26468
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Academic Papers
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2bbd115db930ab8e185f16e5245c429b8ee01168f88242cb8c83fd7a0c049687
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2026-02-02T10:32:22+00:00
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Gold and silver slump deepens and rattles equities
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Declines in precious metals follow record-breaking rally
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https://www.ft.com/content/e830a2cd-604f-4207-8ab8-fefafc6b5d70
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Business & Finance
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ca6bd510f67272046271dc402b951579689563d48ecef7f644b6e984b49206b6
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2026-02-02T06:30:01+00:00
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Kevin Warsh: you have to make a bet
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What comes after data dependence?
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https://www.ft.com/content/057a215b-763c-450d-931c-4a92f9cc4ec1
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Business & Finance
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934622a16610ddd91330a60b32c2c2f453428e9c988f9bef06a3150476bc0dbb
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2026-02-02T05:00:11+00:00
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A world without nuclear arms control begins this week
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New Start treaty, which expires on Thursday, capped the number of missiles and warheads in US and Russian arsenals
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https://www.ft.com/content/fd1d2e57-dce7-489d-956a-22b839cfadd8
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Business & Finance
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08b7b122d6c04be68f25ebff8c5aafc0d4cd3d97aa6f33b818f28729d1e3c536
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2026-02-02T05:00:19+00:00
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Wanted: CEOs with backbone
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The killing of Alex Pretti in Minneapolis is a moment for leaders to challenge America’s direction
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https://www.ft.com/content/89d0f1b2-3524-429b-b328-b2cb9ba11d15
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Business & Finance
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dff14f6176d0980b8d5089148c8df38bbd26f58406226bbb0b9a6aebf7f8cef2
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2026-02-02T05:00:19+00:00
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The dilemmas for the UK created by a rupturing world
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New priorities are needed to succeed amid unreliable and competing great powers
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https://www.ft.com/content/a8705e20-1c99-47a3-b86c-4346db79a8a3
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Business & Finance
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b4616b266e72447af88acbf84c1a621a77bd0104989ec6a3b8dda49b35c5f4a6
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2026-02-01T22:48:42+00:00
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JPMorgan should ‘threaten’ UK over banker tax, Mandelson told Epstein
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Former business secretary has quit the Labour Party in an effort to avoid causing it ‘further embarrassment’
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https://www.ft.com/content/91e8142a-3d4c-4222-a5ad-6548fc9907d1
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Business & Finance
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3faa8bb1afb10a0673a7c6d5b6af3cc666a44ec9624e83e517e6bb8bc322f9e0
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2026-02-01T23:01:48+00:00
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Apollo chief Marc Rowan consulted Epstein on firm’s tax affairs
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New files reveal extensive talks between disgraced financier and key decision makers at US private capital firm
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https://www.ft.com/content/092d9e44-ec17-4da7-8b58-e43bf09113ab
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Business & Finance
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798b3d8e6c13365f0f891a2c69deb4a884f973c37f858724bc2beed8fba3f086
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2026-02-02T00:25:54+00:00
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How HSBC fashioned a $600bn debt machine
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American banker Michael Roberts will head up the lender’s new corporate and institutional division
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https://www.ft.com/content/3329ee04-b5d5-4393-a00c-640d6358ef92
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Business & Finance
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1203a2e78fb95317b82eb00c69826391db3e75dd46532f48b22efa81dc4fee24
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2026-02-02T01:44:31+00:00
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Donald Trump to shut Kennedy Center for 2 years of renovations
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Remodelling of top performing arts facility is latest attempt by US president to put his stamp on Washington
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https://www.ft.com/content/8cdc0be2-a957-40f9-8731-7b1718ced693
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Business & Finance
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9a0db28c9a4407ac3dc09626b453ba90513c8246d852ecdcc56e5ccf45f48698
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2026-02-02T05:00:19+00:00
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Europe’s oil majors prepare to cut billions in shareholder payouts
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Shell, BP and peers widely expected to rein in buybacks to protect balance sheets in face of lower oil prices
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https://www.ft.com/content/b4f22a34-8ad1-4062-b395-aa71cd7be130
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Business & Finance
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8851fda9cd0a1ff8c450cac8a7ab11c2bbd4b470741da2276ad7f9a2a0e41dec
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2026-02-02T11:12:00+00:00
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Gold now down nearly $1,000 from peak as silver attempts to stabilize following record 31% slump
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A volatile day is setting up for precious and base metals on Monday with silver and China selling in focus.
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https://www.marketwatch.com/story/gold-now-down-nearly-1-000-from-peak-as-silver-struggles-following-record-31-slump-56067f2a?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-90339779
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4179735c5d050392e6f973b03c54bd8867bea33a2e9a7d09bfcd739b37312d5a
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2026-02-02T10:59:00+00:00
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Michael Saylor’s Strategy sees bitcoin holdings trade below purchase price
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The bitcoin holdings of Michael Saylor’s Strategy were briefly underwater in a sign of the unwinding in cryptocurrency value this year.
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https://www.marketwatch.com/story/michael-saylors-bitcoin-holdings-briefly-went-underwater-2d63d929?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-28800870
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54bfe755354a53e4c4b657e26e5e4dfbc7d77b448e76e44588d315d9262c665c
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2026-02-02T10:58:00+00:00
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Oil prices are falling sharply. Lowered U.S.-Iran tensions and metals spillover is being blamed.
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Oil prices fell sharply on Monday after President Donald Trump said he was hopeful over negotiations with Iran, taking some of the fear premium out of the commodity.
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https://www.marketwatch.com/story/oil-prices-are-falling-sharply-lowered-u-s-iran-tensions-and-metals-spillover-is-being-blamed-79da244d?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-32859400
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56f56615da1616072763abcccf8b9a8988104d7078c9bafdedb26ea20a1e5f9e
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2026-02-02T10:15:00+00:00
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‘Hell of a story, isn’t it?’: My brother stole $500K from my ailing father. Can we get justice?
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“I split our father’s estate on the understanding that no such $500,000 transfer had been made.”
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https://www.marketwatch.com/story/hell-of-a-story-isnt-it-my-brother-stole-500k-from-my-ailing-father-can-we-get-justice-e2848289?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-38592856
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d208faa4095ecaf84989d8b25658985196ecc99be57a7b1078874213def3c1ee
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2026-02-02T10:12:00+00:00
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Italian lender loses nearly half its value on profit warning, CEO exit
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An Italian specialty finance lender that buys up the invoices from the Italian public sector lost nearly half of its value on Monday after the ousting of its chief executive and a profit warning.
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https://www.marketwatch.com/story/italian-lender-loses-nearly-half-its-value-on-profit-warning-ceo-exit-2e42e9fc?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-53934923
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1fdb54fd17e5187a5fbc4a8fc7f47d7e5c043f1258941b6d3d915ffebad74e84
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2026-02-02T10:04:00+00:00
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Hulk Hogan’s Florida home listed for $11 million, 6 months after his death
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Famed wrestler Hulk Hogan’s sprawling Clearwater home is on the market for $11 million, six months after the father of two died from cardiac arrest at the property.
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https://www.marketwatch.com/story/hulk-hogans-florida-home-listed-for-11-million-6-months-after-his-death-f4e23d08?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-86750427
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2b9be96431c32966c008aa75f068e71afc412b7ad40ad027519ccbbd518de00f
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2026-02-02T10:01:00+00:00
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Google billionaire Sergey Brin buys a $42 million Tahoe mansion, a few months after buying a $50 million Malibu home
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Google billionaire Sergey Brin has been linked to two extravagant property purchases in neighboring states.
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https://www.marketwatch.com/story/google-billionaire-sergey-brin-buys-a-42-million-tahoe-mansion-a-few-months-after-buying-a-50-million-malibu-home-8c6c12da?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-95040210
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16c2bc7d1735a3f730f29fdbfccfad9e0cfec45e069b2b024add558e9ee4654f
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2026-02-02T10:00:00+00:00
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‘We live on Social Security and pensions’: I’m in my 70s and my house needs repairs. Do I take out a $50K loan — or sell stocks?
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“Our house is paid off.”
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https://www.marketwatch.com/story/we-live-on-social-security-and-pensions-im-in-my-70s-and-my-house-needs-repairs-do-i-take-out-a-50k-loan-or-sell-stocks-44c2ddbe?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-89032168
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ec7edf4061e9d0617fd2477aa2c4156bf0f2deacf6a81ac70f4c1404db5ca41d
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2026-02-02T09:31:00+00:00
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Oracle amps up its AI bet with a plan to raise as much as $50 billion this year
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After issuing an $18 billion bond offering last fall, Oracle intends to tap the debt and equity markets anew in 2026.
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https://www.marketwatch.com/story/oracle-amps-up-its-ai-bet-with-a-plan-to-raise-as-much-as-50-billion-this-year-872a2dba?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-48727439
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9b78ad56ced5522f36142f31ba898d2fe16be4488b777203e4d9b9c80761c98e
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2026-02-02T03:59:00+00:00
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U.S. stock futures fall after bitcoin’s weekend drop, as gold and silver’s sell-off may be bleeding into other markets
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U.S. stock futures fell Sunday, after a weekend slide by bitcoin and Friday’s massive sell-off in precious metals capped a tumultuous first month of 2026.
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https://www.marketwatch.com/story/u-s-stock-futures-fall-along-with-bitcoin-and-oil-prices-21adfaf3?mod=mw_rss_topstories
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Business & Finance
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https://images.mktw.net/im-46776123
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02bb04deb4e9fa16f178189d631459a596061b14eccbe1eaf7fbfc861a2a63da
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2026-02-02T10:21:37+00:00
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Oracle dips 3% after announcing $50 billion fundraising plans. Here's why
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The tech giant has invested huge sums in the AI infrastructure buildout in recent times
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https://www.cnbc.com/2026/02/02/oracle-stock-price-funding-plans.html
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Business & Finance
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svg
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41ee6e9c4aa954098d45f984ff47a0796544eb3aaef5cceae270db02d628b0db
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2026-02-02T10:28:14+00:00
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How to trade the market spiral as investors dump gold, silver and oil
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Analysts flagged U.S. President Donald Trump’s nomination for the next chair of the Federal Reserve as a key trigger to the latest market downturn.
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https://www.cnbc.com/2026/02/02/gold-silver-oil-prices-fed-warsh-markets-investors.html
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Business & Finance
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svg
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d85b2b7ef7e76ab340f7da6cb8dbe0725f361c174985bdb26bafa2f5c8cf1d38
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2026-02-01T17:07:06+00:00
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Speaker Johnson: 'Confident' government shutdown will end by Tuesday
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The government shut down on Saturday after Senate Democrats demanded changes to a spending package following the killings of U.S. citizens in Minnesota.
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https://www.cnbc.com/2026/02/01/government-shutdown-mike-johnson.html
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Business & Finance
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svg
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ecb9d90187eb81ec2475d90f8cd4b70eba513d12b2137b7d8cc42695840a89fc
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2026-02-02T05:01:01+00:00
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Here's what to expect when Disney reports earnings before the bell
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Disney's streaming and TV business, as well as its theme parks segment, will be the focus for Wall Street on Monday when the company reports earnings.
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https://www.cnbc.com/2026/02/02/disney-dis-earnings-q1-26.html
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Business & Finance
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svg
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ca2d42d938c959ac0710f65b270a082d5742c95d2f7c9de8874d53ee690fe20a
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2026-02-02T08:28:53+00:00
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Gold dives 5% and silver crashes 7%, extending sell-off in precious metals after historic plunge
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Gold and silver extended sell-off on Monday, deepening losses from last Friday's rout.
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https://www.cnbc.com/2026/02/02/gold-silver-sell-off-historic-plunge-.html
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Business & Finance
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svg
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16be63b66a7e21677c785be38bd68da1acf23606d5e824a467d634ee3a9b3390
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2026-02-02T10:48:08+00:00
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Bitcoin is under pressure after a brutal week. Here's why
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Cryptocurrency markets fell as global equities and precious metals sold off while bitcoin liquidations exacerbated downside moves.
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https://www.cnbc.com/2026/02/02/bitcoin-btc-price-today-cryptocurrency.html
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Business & Finance
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svg
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b60460e7bb7a4bb39deb4a3f86c9e990d007eeb5a5dbce37e846d1615946235d
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2026-02-02T10:09:58+00:00
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From Clawdbot to Moltbot to OpenClaw: Meet the AI agent generating buzz and fear globally
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OpenClaw, formerly known as Clawdbot and Moltbot, has created massive buzz from Silicon Valley to Beijing due to its impressive capabilities, but also its quirks and risks.
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https://www.cnbc.com/2026/02/02/openclaw-open-source-ai-agent-rise-controversy-clawdbot-moltbot-moltbook.html
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Business & Finance
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svg
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b5cf6177846f392de2f70e2717be5dbb9f483a8d26a4893517dcc3b45aff97b6
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2026-02-02T06:31:19+00:00
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Why the catastrophe bond market is so hot right now
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CAT bonds are known to offer highly attractive equity-like returns, low volatility and low correlation to broader financial markets.
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https://www.cnbc.com/2026/02/02/catastrophe-bonds-insurance-climate-change-markets.html
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Business & Finance
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svg
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12a82d8e4a63e1958ba8100f6bec54d0fa2e95c86e4781abf883cee5e8fb0ce6
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2026-02-01T19:04:50+00:00
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Epstein files: Ro Khanna says DOJ's latest release is 'not good enough'
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The congressional Democrat said that Friday's Epstein disclosure was "significant," but it is only about half of the files that have been collected.
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https://www.cnbc.com/2026/02/01/epstein-files-ro-khanna-says-dojs-release-is-not-good-enough.html
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Business & Finance
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svg
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3076ec2c3741f83192fc01377d5799b5ad3fc20dc19085644cbccdf2873914e8
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2026-02-01T20:36:33+00:00
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United Arab Emirates' 'Spy Sheikh' bought secret stake in Trump crypto company: WSJ
|
“This is corruption, plain and simple," said Massachusetts Sen. Elizabeth Warren, the top Democrat on the Senate Banking Committee.
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https://www.cnbc.com/2026/02/01/spy-sheikh-stake-trump-crypto.html
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Business & Finance
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svg
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0c5f94bb1a6ec463f12ae3c4b7339d38e3e21c6176402ff191a56f737a15bd8c
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2026-02-01T16:34:11+00:00
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'Melania' earns a surprising $7 million, best non-music documentary debut in a decade
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Amazon reportedly paid an estimated $40 million to acquire 'Melania' and spent an additional $35 million on marketing.
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https://www.cnbc.com/2026/02/01/melania-documentary-posts-7-million-domestic-opening.html
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Business & Finance
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svg
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a951187de09d78bc3ade1b3186cc86932b1eb7a9885d9d5b7b207eab6e4095cb
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2026-02-01T16:27:30+00:00
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As American retail store anchors fade, private clubs are taking over more commercial real estate
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Affluent consumers are key to retail centers as the K-shaped economy hits lower-end shoppers hard, and that's leading the private club concept to more cities.
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https://www.cnbc.com/2026/02/01/retail-mall-stores-closures-private-clubs-commercial-real-estate.html
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Business & Finance
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svg
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8f2d61008f296dbd8774e7168b74438aed7245283a8ddaad9ef2aa4cf0a80e26
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2026-02-02T10:32:10+00:00
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AstraZeneca is listing in New York, as Big Pharma balances the huge U.S. market with China's tempting innovation
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AstraZeneca announces multibillion dollar investments in China as Big Pharma is increasingly looking east for innovation.
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https://www.cnbc.com/2026/02/01/astrazeneca-nyse-listing-china-pharma-pours-15-billion-into-china.html
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Business & Finance
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svg
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ea8416ff4ec2ddd6d35949d0047d4c6ad68e33a7571811b42eebf502b01c7810
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2026-02-01T19:21:15+00:00
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What Trump's choice of Kevin Warsh for Fed chair may mean for consumers
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Trump's choice for Fed chair could have far-reaching consequences for almost all consumer borrowing costs and savings rates.
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https://www.cnbc.com/2026/01/30/trump-fed-chair-pick-kevin-warsh.html
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Business & Finance
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svg
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7b3416510909979eacbd2b53da35d560b54d2201caabd7dda2996eec5a453c6b
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2026-02-02T06:08:37+00:00
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Chinese organized crime networks moved $16 billion in crypto in 2025, according to report
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A report published on Tuesday has found Chinese organized crime networks to be laundering massive volumes of illicit funds through
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https://www.cnbc.com/2026/02/02/chinese-money-laundering-networks-crypto-telegram-2025-chainalysis-scam-southeast-asia-cambodia.html
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Business & Finance
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svg
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5e276c767223a8caaccf1ebb8ea12b37e93e75e36e4145f086c5996d0b21a547
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2026-01-31T19:12:14+00:00
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Federal judge denies bid to end ICE Operation Metro Surge in Minnesota
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The crackdown "has had, and will likely continue to have, profound and even heartbreaking, consequences," U.S. District Judge Menendez said in the ruling.
|
https://www.cnbc.com/2026/01/31/federal-judge-denies-bid-to-end-ice-operation-metro-surge-in-minnesota.html
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Business & Finance
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svg
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4edeefe57543046b1a00461cd003c25bcddc987ed099769ada4566375fbcd822
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2026-02-01T23:46:34+00:00
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Cramer handicaps the collision of 2 more Big Tech earnings and the jobs report
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Alphabet on Wednesday evening and Amazon on Thursday evening should define the week — at least, until Friday's employment data.
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https://www.cnbc.com/2026/02/01/cramer-handicaps-the-collision-of-2-more-big-tech-earnings-and-the-jobs-report.html
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Business & Finance
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svg
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b206fc38d2d754c733fc91380e254a121a2c3c6d57082918063b48d888526de0
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2026-02-01T12:00:01+00:00
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How the EV pullback is affecting factories and jobs in the South
|
Automakers, suppliers and battery makers were funneling hundreds of billions of dollars into EV-related manufacturing in the U.S. Now it's all in question.
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https://www.cnbc.com/2026/02/01/ev-pullback-factories-jobs-south.html
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Business & Finance
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svg
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e8c5ffc2debccc3ef0504650b417cda4b9471d14ecaf51f2fa77763d33685e47
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2026-02-02T08:37:50+00:00
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India courts Big Tech with long‑term tax breaks as it doubles down on AI ambitions
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India woos global cloud service companies with tax holiday for 20 years.
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https://www.cnbc.com/2026/02/02/india-tax-breaks-hyperscalers-ai-bet.html
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Business & Finance
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svg
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1045f42b10e2216eb3826a9d5dc0b55fcf54c1f20f0f1d78d0bb6c0c43d5f19e
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2026-02-02T05:32:40+00:00
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China's factory activity grows at fastest pace since October, private survey shows, beating official reading
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The RatingDog China General Manufacturing PMI, rose to 50.3 in January from 50.1 the previous month, in line with analysts' expectations in a Reuters poll.
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https://www.cnbc.com/2026/02/02/china-factory-activity-private-survey-official-reading-pmi-january-lunar-new-year-ratingdog.html
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Business & Finance
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svg
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339767016da28f9b2f7b9902ecb0c1d3ad0dc8f7e2699abf3b0fcd06552522ae
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2026-02-02T08:30:17+00:00
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Oil slides over 5% as Trump signals Iran talks, easing supply shock fears
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Oil prices slid as investors dial back fears of a supply shock after Donald Trump said Iran was "seriously talking" with Washington over the weekend.
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https://www.cnbc.com/2026/02/02/oil-slides-as-trump-signals-iran-talks-easing-supply-shock-fears.html
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Business & Finance
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svg
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0efd521edc4a0663469426b193421f39831d0f63ed76c94e33a5434add39a0bf
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2026-01-30T17:49:53+00:00
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Southwest ends open seating after 54 years. Here's what the last flight was like
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Southwest Airlines replaced open seating with assigned seats after more than 50 years.
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https://www.cnbc.com/2026/01/28/southwest-airlines-ends-open-seating.html
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Business & Finance
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svg
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bd863d958a5e33105c3b37bf57d56b30c6b7c18847eeb39a89c8c0ccf475e458
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2026-01-30T18:28:58+00:00
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Everything you need to know about Kevin Warsh, Trump's pick to lead the Federal Reserve
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Kevin Warsh, a former Fed governor, has emerged as Donald Trump’s pick to lead the Federal Reserve. Here’s his background, views and why it matters.
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https://www.cnbc.com/2026/01/30/who-is-kevin-warsh-trumps-fed-chair-pick.html
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Business & Finance
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svg
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31aeb46fff5063d5129061ac1e7ecef03c75902a2c31a859228150ac33c03aa2
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2026-02-01T23:38:15+00:00
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How Chinese short-video streaming firms are reshaping Latin America's media landscape
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Short-drama apps, many with Chinese origins, are making significant inroads in Latin America as the region becomes more affluent, research shows.
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https://www.cnbc.com/2026/02/01/how-chinas-short-video-streamers-are-reshaping-latin-americas-media.html
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Business & Finance
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svg
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7ede62f4e7718c891f1d3f594c56d9ab7872c012ac29b60db053d019a4e247c2
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2026-02-01T12:52:39+00:00
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India's finance minister projects modest fiscal consolidation in budget
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Nirmala Sitharaman sees small improvements in fiscal deficit and debt-to-GDP ratio
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https://www.cnbc.com/2026/02/01/indias-finance-minister-sees-modest-fiscal-consolidation-in-budget.html
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Business & Finance
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svg
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cf6648bb6dff07da590ba88fb0d8ffdb6c2006a3e4451961d0ba73885d3d97c8
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2026-01-31T16:58:50+00:00
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American Express challenges Apple for No. 1 slot in Berkshire's portfolio
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Big Apple sales and gains for American Express have put Amex within a few billion dollars of becoming the most valuable holding in Berkshire's portfolio.
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https://www.cnbc.com/2026/01/31/american-express-challenges-apple-for-no-1-slot-in-berkshires-portfolio.html
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Business & Finance
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svg
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710e3a72fd23832c40bcfc7b499a30aa18f91621bdb6b17dbe6013c184890a94
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2026-01-31T13:00:01+00:00
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Big Food gets leaner with divestitures and breakups as consumers turn away from packaged snacks
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Big Food has been selling off underperforming brands or even splitting up, as the industry faces weaker demand.
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https://www.cnbc.com/2026/01/31/kraft-heinz-kellogg-breakups-show-big-food-is-getting-smaller.html
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Business & Finance
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svg
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ac10862e25c6bada4bbf4b5d5299a5642cf03fe0cd17400a2944bb23246c5639
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2026-01-31T14:09:38+00:00
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Activist Dan Loeb dusts off his poison pen as he seeks a board refresh at CoStar Group
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Investors are seeing shades of yesteryear's Dan Loeb in a letter he recently wrote to the CoStar board.
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https://www.cnbc.com/2026/01/31/activist-dan-loeb-dusts-off-his-poison-pen-as-he-seeks-a-board-refresh-at-costar-group.html
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Business & Finance
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svg
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919eab067592203369c9f9810a64e144e11e5a70c989f505a82c5d6c55995cd4
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2026-01-31T05:56:33+00:00
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Epstein files show Elon Musk apparently discussed plans to visit sex offender's island, host him at SpaceX
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Elon Musk corresponded with Jeffrey Epstein in 2012 and 2013, according to newly released files, and sought to visit Epstein's island and host him at SpaceX.
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https://www.cnbc.com/2026/01/30/epstein-files-show-elon-musk-planned-visit-to-island-host-at-spacex.html
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Business & Finance
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svg
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93d68167415c38638bfb81cc2011fe4bc0731477c36bc67d6b4c76a8745a6d27
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2026-02-02T08:03:19+00:00
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Is 'America First' starting to backfire as Washington's allies go it alone?
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Trump's volatility and unpredictability, as well as tariffs and territorial threats, have spooked erstwhile allies.
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https://www.cnbc.com/2026/01/31/trump-america-first-policy-tariffs-hostility-backfire-trade-deals.html
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Business & Finance
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svg
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eebcb10d783745f03665e57deb513c6be19963998e16c590c9b735a8302904b6
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2026-02-02T04:12:49+00:00
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VP Duterte faces fresh impeachment complaints
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Two impeachment complaints were filed against Vice-President Sara Duterte-Carpio on Monday, reviving efforts to remove her from office over corruption allegations after a bid last year stalled when the Supreme Court halted proceedings. The first complaint, filed by activists affiliated with opposition groups, accused Ms. Duterte of misusing hundreds of millions of pesos in confidential funds, ordering subordinates to falsify reports to conceal the alleged misuse and repeatedly skipping congressional hearings on her office’s budget. Ms. Duterte is prepared to answer the allegations, her defense spokesman Michael T. Poa said in a statement. She is confident that an impartial review would find the accusations “devoid of both factual and legal basis.” “The people already know what happened in the past, and we will not give the second-highest official of the land any excuse to be corrupt,” former congresswoman Arlene D. Brosas told a news briefing in Filipino after the complaint was filed at the House of Representatives. The accusations echo similar claims raised two years ago, when calls for Ms. Duterte’s impeachment intensified after a congressional inquiry that found she might have misused more than 612.5 million in confidential and intelligence funds. “The Constitution does not permit such cynical disregard for public trust,” according to a copy of the complaint, alleging betrayal of public trust — one of the five constitutional grounds for impeachment, along with bribery, treason, graft and corruption and culpable violation of the Constitution. It added that the Vice President had treated public funds as a “personal war chest” while evading legislative oversight. The complaint was endorsed by party-list lawmakers Antonio L. Tinio, Sarah Jane Elago and Renee Louise M. Co. A second impeachment complaint was later filed by civil society and religious leaders, accusing Ms. Duterte of corruption, unexplained wealth and betrayal of public trust. “The impeachment complaint is not that different from the previous one,” complainant Francis Joseph “Kiko” Aquino Dee said, noting that the Supreme Court had not cleared the Vice President of the earlier allegations. Ms. Duterte was impeached by the House last year after more than a third of lawmakers backed a fourth complaint, which was transmitted directly to the Senate. She later won a Supreme Court ruling that voided the proceedings, with the high court saying lawmakers violated constitutional rules by bypassing earlier complaints. The court barred impeachment moves against the Vice President until Feb. 6, though its ruling allowed new complaints to be filed starting Jan. 15. Renewed impeachment efforts risk reopening a bitter political feud between the Duterte and Marcos camps, whose alliance in the 2022 elections has since unraveled. — Kenneth Christiane L. Basilio
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https://www.bworldonline.com/the-nation/2026/02/02/727872/vp-duterte-faces-fresh-impeachment-complaints/
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Business & Finance
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ab1a763c350f8fc5a73463993e200982f3e27c1ac81179bafc790c16545bb18a
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2026-02-02T01:59:43+00:00
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PHL manufacturing activity growth hits nine-month high in January
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PHILIPPINE factory activity in January expanded at its fastest pace in nine months amid an increase in output and new orders, S&P Global said on Monday. S&P Global Philippines Manufacturing Purchasing Managers’ Index (PMI) rose to 52.9 in January from 50.2 in December, the strongest improvement in nine months or since April’s 53.0. A PMI reading above 50 denotes better operating conditions than in the preceding month, while a reading below 50 shows deterioration. Maryam Baluch, economist at S&P Global Market Intelligence, said the January PMI data showed a “marked shift in momentum” after a prolonged period of subdued growth in the second half of 2025 due to weather disruptions. “New orders registered a strong and accelerated uptick, supported in part by a renewed rise in export demand. As a result, production returned to expansion territory for the first time in five months,” Ms. Baluch said. “Firms responded by stepping up their purchasing activity and increasing their staffing levels in January,” she added. — Aubrey Rose A. Inosante
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https://www.bworldonline.com/top-stories/2026/02/02/727862/phl-manufacturing-activity-growth-hits-nine-month-high-in-january/
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Business & Finance
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db83afaa1b57ad3ca92576603db09f9f11704fbd33557eece188c1c22f3e2848
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2026-02-01T16:33:08+00:00
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PHL recovery likely delayed in 2026 amid corruption drag, analysts say
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By Aubrey Rose A. Inosante, Reporter THE PHILIPPINE ECONOMY may shake off its slump by mid-2026, but lingering governance issues and execution bottlenecks could delay the recovery, economists said. Growth is expected to remain subdued in the first quarter as households face income shocks and the lingering impact of natural disasters, John Paolo R. Rivera, a senior research fellow at the Philippine Institute for Development Studies, said in a Viber message on Jan. 31. Companies are also postponing investment until policy clarity and governance signals improve, he pointed out. “A meaningful recovery is more likely from mid-2026 onward, rather than immediately in the first quarter, as confidence and execution constraints take time to unwind.” The economy grew 3% in the fourth quarter of 2025, bringing full-year gross domestic product (GDP) to 4.4%, well below the government’s 5.5%-6.5% target. This was the slowest in almost five years and, excluding pandemic effects, the weakest since 2009. Economy Secretary Arsenio M. Balisacan attributed the slowdown to bad weather and a corruption scandal involving anomalous flood control projects, which dampened consumer and investor sentiment. “A stronger pickup would be underpinned by faster public spending rollout, easing inflation and interest rates, a stable peso and improved investor sentiment that crowds in private capital,” Mr. Rivera said. Household consumption may recover gradually, but a durable rebound depends on restored confidence and accelerated investment-led growth. Citigroup, Inc. projected modest GDP growth in the first half, before gaining momentum in the second half. Its baseline forecast is 3.5-4% GDP growth in the first half, before gradually reaching around 5% by the fourth quarter, it said in a statement last week. It expects full-year growth of 4.5%, slightly above last year’s 4.4% but below the government’s target. Citi expects public investment to continue contracting in the first quarter, though slower than in the last quarter. Government spending grew 3.7% last quarter and 9.1% for the year, partly due to front-loaded election-related disbursements. “Any subsequent recovery of public investment spending should be quickly followed by a turnaround of household consumption growth.” Household consumption, the economy’s largest component at over 70%, rose 3.8% last quarter and 4.6% for the year. Citi also flagged potential policy easing, noting room for a 25-basis-point BSP rate cut in February, with a further cut in April possible if growth remains weak. The University of Asia and the Pacific expects a rebound this quarter, supported by early disbursement of P1.6 trillion to local government units and low inflation. It projects 5% GDP growth for the first quarter and full year of 2026, matching the lower bound of the government’s target. Analysts stressed that a sustained recovery hinges on governance reforms. Emmanuel J. Lopez, an associate professor at Colegio de San Juan de Letran, said political and geopolitical risks continue to impede the economy. “More than short-term solutions, hard investments should be implemented, resulting in a long-term benefit,” he said via Viber. Calixto V. Chikiamco, president of the Foundation for Economic Freedom, said recovery would depend on transparency and anti-corruption measures. Without these, the economy will likely face a period of slow growth, he said, citing high interest rates, geopolitical tensions and political instability. Business groups are cautiously optimistic. The Federation of Philippine Industries (FPI) expects investment to rebound as delayed infrastructure projects resume. The “real lift” will come from faster public spending, clear policy signals and renewed investor confidence,” FPI Chairperson Elizabeth H. Lee said in a statement.
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https://www.bworldonline.com/top-stories/2026/02/02/727763/phl-recovery-likely-delayed-in-2026-amid-corruption-drag-analysts-say/
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Business & Finance
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2fcd5ec5b59e7bb3012f3aac8e796934d3aea17d856b8f749d27cbb11dfb7dba
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2026-02-01T16:32:07+00:00
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Philippine infrastructure spending declines for fifth straight month in Nov.
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PHILIPPINE GOVERNMENT spending on infrastructure fell for a fifth straight month in November, underscoring how a widening corruption investigation has weighed on public works implementation and fiscal momentum. State disbursements for infrastructure and other capital outlays plunged 45.2% to P48 billion from a year earlier, according to data released by the Department of Budget and Management (DBM) on Jan. 31. Spending also declined 27.2% from October. November marked the fifth straight annual contraction since July, when infrastructure spending dropped 25.3% after allegations of corruption linked to flood control projects surfaced. The scandal has since triggered investigations, leadership changes and tighter scrutiny of project approvals, slowing the pace of government outlays. “The spending performance of the DPWH (Department of Public Works and Highways) continued to post negative growth amid the ongoing probe and crackdown on corruption issues,” the DBM said. The fiscal slowdown curtailed project execution and prompted contractors to submit progress billings and payment claims immediately, the agency said, as authorities sought to strengthen controls and oversight. The DPWH, which has been at the center of the controversy, has undergone a budget overhaul, the dismissal of several officials and a continuing investigation that weakened sentiment and slowed activity across the construction sector. The fallout has also spilled over to the broader economy, weighing on household spending and private investment. From January to November, total government infrastructure spending fell 16% to P991.1 billion from a year earlier. This accounted for 65.51% of the government’s P1.51-trillion full-year infrastructure program. “Infrastructure spending was weighed down significantly by the contraction of DPWH’s disbursements during the period in the wake of flood control corruption issues,” the DBM said. Broader infrastructure disbursements, which include capital components of subsidies and equity infusions to state-owned companies, as well as transfers to local government units, also weakened. These fell 13.3% year on year to P1.2 trillion in the first 11 months of the year. Public Works Secretary Vivencio “Vince” B. Dizon said last month the agency was seeking to lift spending while ensuring public funds are deployed prudently. The DPWH has set a spending program of P200 billion to P250 billion this quarter, signaling an effort to regain momentum after months of subdued disbursements. Despite the drag from infrastructure, total government spending edged up 2.5% to P5.41 trillion in January to November, equivalent to about 89% of the P6.08-trillion full-year program. For the final stretch of 2025, the DBM said overall spending would be supported by payments to cover personnel service shortfalls across line agencies, including the release of benefits and the creation or filling of government positions. “Based on a preliminary report of allotment releases, some P74.3 billion worth of allotments were released in December 2025, which might have helped propel spending for the remainder of 2025,” the agency said. Additional spending drivers include the rollout of social programs such as disaster relief and recovery, education subsidies and funding for local development initiatives, the DBM added. WAIT-AND-SEE STANCE Economists said the corruption probe has been a major factor behind the persistent contraction in infrastructure outlays. Michael L. Ricafort, chief economist at Rizal Commercial Banking Corp., said the scandal has forced authorities to adopt a more cautious approach to public works spending. “This was caused by the continued caution versus the risk of corruption for various government spending on infrastructure,” he said in a Viber message. He added that the pullback in government spending has been a key contributor to the recent softness in economic growth, given the sector’s role as a major pillar of gross domestic product. The slowdown has also weighed on investor sentiment, prompting a wait-and-see stance that curbed private investment, Mr. Ricafort said. Against this backdrop, he noted it would be difficult for the government to meet its P1.51-trillion infrastructure target for 2025. “Yes, tough one, as manifested by the weaker-than-expected local GDP data,” he said. Philippine economic growth slowed sharply to 4.4% last year from 5.7% in 2024, as the infrastructure pullback dampened public spending and eroded confidence among consumers and businesses. The expansion was the weakest in five years, excluding the 9.5% contraction in 2020 at the height of the pandemic, and the slowest since 2011 if the pandemic period is set aside. Still, Mr. Ricafort said a rebound in infrastructure spending is likely this year, supported by catch-up programs anchored on stronger governance and anti-corruption measures. Acting Budget Secretary Roland U. Toledo said the government remains committed to scaling up infrastructure investment over the medium term, adding that risks of project delays this year are limited after what he described as a “clean” budget process. For 2026, the Development Budget Coordination Committee (DBCC) has scaled back its infrastructure outlay target to 4.3% of GDP, or about P1.3 trillion, from an earlier goal of 5.1% of GDP, equivalent to P1.56 trillion. The overall government disbursement program for next year was also trimmed by 3.19% to P4.824 trillion. Finance Secretary Frederick D. Go said public spending is expected to rebound this year, noting that authorities have worked to clear bottlenecks in the spending program. The top five spending agencies include the DPWH and the Education, Health, Agriculture and Transportation departments, he said. — Aubrey Rose A. Inosante
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https://www.bworldonline.com/top-stories/2026/02/02/727762/philippine-infrastructure-spending-declines-for-fifth-straight-month-in-nov/
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Business & Finance
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7838b0d8adcf83411162a6b22fe2cfb911b40ce7777870c1f99684a8383bd785
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2026-02-01T16:31:07+00:00
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Hog raisers urge gov’t to increase pork tariffs
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HOG RAISERS want the government to restore higher pork tariffs, warning that a surge in imports has oversupplied the market and dragged down farmgate prices. Alfred Ng, vice-chairman of the National Federation of Hog Farmers, said the group is pushing to raise pork tariffs back to 40%, arguing that lower duties have outlived their purpose and are now hurting local producers. Lower tariff rates were introduced in 2021 to stabilize pork prices after African swine fever disrupted domestic supply. Since then, tariffs have remained at 15% for in-quota imports and 25% for out-of-quota shipments. “Tariffs are supposed to protect local farmers from unfair trade and the dumping of subsidized agricultural products,” Mr. Ng said in a Viber message. “The reductions were meant to be temporary, but they have remained in place even as import volumes surged.” Pork imports rose about 16% last year, or roughly 120 million kilos, bringing total shipments to more than 850 million kilos. Mr. Ng said these volumes are unprecedented and have weighed heavily on local prices. He said live hog prices began falling in June last year and failed to recover during the usual peak months of December and January, when demand typically lifts prices. “For the first time in more than 30 years of hog farming, liveweight prices did not improve in December and continued to decline in January,” he said. Data from the Philippine Statistics Authority showed that average liveweight hog prices in the fourth quarter fell 14% to P182.83 per kilo, from a year-high average of P212.54 per kilo in the first quarter. In response to the sharp drop, the Department of Agriculture agreed in November to raise the floor price for live hogs to P210 per kilo after prices sank to as low as P150 per kilo, close to production cost. Despite the weakness at the farm level, Mr. Ng said retail pork prices in wet markets remained elevated, even as the landed cost of imported pork fell to about P120 per kilo. “This clearly shows that consumers are not benefiting from importation,” he said. “Instead, local farmers are bearing the cost, while importers are capturing the margins. Mr. Ng also raised concerns over food safety, saying frozen imported pork has entered wet markets and been sold as thawed meat, competing directly with locally produced pork. He said this practice violates agriculture regulations that prohibit the display and sale of thawed frozen meat without proper chilling equipment. Continued overimportation could undermine the Department of Agriculture’s multibillion-peso hog repopulation program, Mr. Ng said, as low prices and the risk of African swine fever discourage farmers, especially small producers, from raising hogs. Aside from restoring higher tariffs, hog raisers are calling for tighter controls on pork import volumes to cover only supply shortfalls, as well as stronger border inspections. These measures would help keep unsafe and smuggled meat out of the market and protect both farmers and consumers, he added. — Vonn Andrei E. Villamiel
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https://www.bworldonline.com/top-stories/2026/02/02/727761/hog-raisers-urge-govt-to-increase-pork-tariffs/
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Business & Finance
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d767468dc5289ee0e7cec6e9cfbea95345ea98e8e348d15125a14571a967ff3f
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2026-02-01T16:07:48+00:00
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Meralco-First Gen gas supply contract extended until June
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THE Energy Regulatory Commission (ERC) has granted a five-month extension of the gas power supply contract between Manila Electric Co. (Meralco) and First Gen Corp., citing its role in supporting energy security, particularly with the summer months approaching. In an eight-page order promulgated on Jan. 30, the ERC approved the joint motion filed by Meralco and First Gen unit First Gas Power Corp. (FGPC) to continue sourcing power from the Sta. Rita gas-fired power plant in Batangas until June 25, 2026. The approval of the second interim extension comes ahead of the Jan. 31 expiration of the previous temporary extension of the 25-year power purchase agreement. The ERC said the renewed arrangement will be implemented under the same terms and conditions as the earlier extension and will remain a pass-through charge to Meralco customers. In approving the extension, the ERC reiterated that spot market prices could increase by around twofold if the Sta. Rita plant were to operate as a merchant plant, citing simulations conducted by the Independent Electricity Market Operator of the Philippines. FGPC said it would likely be constrained to shut down the power plant due to the loss of offtake. This could, in turn, compel the Malampaya gas field operations and the liquefied natural gas terminal to cease operations because of “technical interdependencies” among the facilities. “This situation presents a critical energy security risk in the Luzon Grid with dire consequences extending beyond power rate increases to rotating power outages that would disrupt household, business, and industrial activities,” the ERC said. The agency also noted the Sta. Rita plant’s contribution to energy security through the frequent operation of its available units at full capacity, helping increase supply and stabilize spot prices. “The Commission is cognizant that the reliable and flexible capacity offered by the Sta. Rita Plant is much needed during the summer months,” the ERC said. “It is thus imperative that the power grids maintain sufficient capacity available to avert yellow/red alerts, power interruptions, or worse, widespread outage.” Meralco’s controlling stakeholder, Beacon Electric Asset Holdings, Inc., is partly owned by PLDT Inc. Hastings Holdings, Inc., a unit of PLDT Beneficial Trust Fund subsidiary MediaQuest Holdings, Inc., has an interest in BusinessWorld through the Philippine Star Group, which it controls. — Sheldeen Joy Talavera
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https://www.bworldonline.com/corporate/2026/02/02/727772/meralco-first-gen-gas-supply-contract-extended-until-june/
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Business & Finance
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6fc1d2f6ebca37a4c4d54a2efcbf7f3f73fb330f72c6876303dd7c5037177f6c
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2026-02-01T16:06:47+00:00
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Tanduay eyes Central and Eastern Europe markets
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TANDUAY is expanding its footprint beyond Western Europe by targeting markets in Slovenia, Slovakia, and Hungary as part of its push into central and eastern regions. Following its debut in Denmark last year, the company said that it is in talks to enter these countries. “Right now, we’re in the western part of Europe, but we’re also trying to penetrate Central and Eastern Europe,” Tanduay International Business Development Manager Roy Kristoffer Sumang told reporters on the sidelines of an event last week. In December, Tanduay Distillers, Inc. announced a distribution partnership with Denmark’s Bastard Spirits to enter the Nordic market and expand its premium rum portfolio. The deal targets wine shops, online retailers, bars, and potential future duty-free listings, capitalizing on Denmark’s openness to new flavors. Last month, the company signed a distribution agreement with Spain’s Torres to bring its brandy to supermarkets nationwide, starting with Torres 5 Light, with additional products arriving in the first quarter as part of the latter’s Philippine market debut. Tanduay is a rum brand produced by Tanduay Distillers, Inc., a subsidiary of the Tan-led conglomerate LT Group, Inc. — Alexandria Grace C. Magno
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https://www.bworldonline.com/corporate/2026/02/02/727771/tanduay-eyes-central-and-eastern-europe-markets/
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Business & Finance
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9c559c050e3cec01a953e1ac2e209f001963efeca912fed44b3a735ec804acb4
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2026-02-01T16:05:47+00:00
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DMCI to break ground on Kalayaan, BGC subway stations this year
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D.M. CONSUNJI, INC. (DMCI) is preparing to break ground on a key portion of the Metro Manila subway project this year, its top executive said. The project, known as contract package 105 (CP 105), covers the Kalayaan and Bonifacio Global City (BGC) stations, with construction expected to start this year, DMCI President and Chief Executive Officer Jorge A. Consunji told reporters last week. The project includes a short tunnel and the two stations, which were originally scheduled for completion in 2029 but have faced delays because of earlier right-of-way issues. DMCI is undertaking the work alongside Japanese firm Nishimatsu Construction Co. Ltd., its partner for another section of the subway covering Quezon Avenue and East Avenue stations. Meanwhile, the company is pursuing another subway project and expects the award decision as early as next month. “That’s just the award phase. The groundbreaking for that is possibly in March or April, depending on the department that handles it — we can’t control that. But it was bid out 18 months ago,” Mr. Consunji said. Without giving details, DMCI said it is eyeing other major projects and possible partnerships with both public and private sectors. DMCI is the construction arm of listed infrastructure and engineering conglomerate DMCI Holdings, Inc., which also has core investments in coal mining, water, off-grid power generation, and property development. — Alexandria Grace C. Magno
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https://www.bworldonline.com/corporate/2026/02/02/727770/dmci-to-break-ground-on-kalayaan-bgc-subway-stations-this-year/
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Business & Finance
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8a462853299eb5a52d336d2c08d836004bfd9f6005188959cb5500d726829d73
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2026-02-01T16:05:40+00:00
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Arthaland forges partnership with Mitsui Fudosan (Asia) for a premium green development in Makati
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Arthaland Corporation (ARTHALAND) and Mitsui Fudosan (Asia) recently entered into a joint venture for the development of Sondris, a premium, multi-certified sustainable residential condominium that will rise along Arnaiz Avenue, Legazpi Village, Makati City. This partnership marks a significant collaboration between Arthaland and Mitsui Fudosan (Asia), a wholly owned subsidiary of Mitsui Fudosan Co., Ltd., one of Japan’s largest real estate companies and a publicly traded company with approximately $62 billion (¥9.8 trillion, as of Dec. 2024) in assets. Mitsui Fudosan has pursued mixed-use neighborhood creation that integrates office buildings, retail facilities, logistics, hotels/resorts, and residentials across various areas in Japan. Mitsui Fudosan’s area of operations is not only in Japan; the Group has been conducting business in major cities in North America, Europe, China, Taiwan, Southeast Asia, Australia, and India. The Group is continuously pursuing business expansion through driving the evolution of neighborhood creation. “We are honored to collaborate with Mitsui Fudosan to bring Sondris to life. By combining ARTHALAND’s deep local experience with a global perspective and Mitsui Fudosan’s distinct strength in truly people-focused neighborhood creation and global expertise, we created a development that delivers durability, functionality, and a new benchmark for refined living in the heart of Makati,” said Jaime C. González, Vice Chairman and President of ARTHALAND. Sondris brings together two like-minded, best-in-class real estate companies with shared values centered on sustainability, green building, and long-term value creation. ARTHALAND leads the project’s development and operations, while Mitsui Fudosan contributes to global expertise in design, engineering, and value preservation. “We express our appreciation and honor in collaborating and developing this project together with Arthaland, a partnership that reflects our shared vision for excellence and sustainability. Guided by this commitment, we take pride in making Sondris one of the pioneering residential developments in the Philippines to pursue multiple prestigious green certifications—underscoring our unwavering commitment to sustainability and future-ready communities. Together, we aspire to deliver a landmark project that harmonizes world-class standards with local insight, creating a destination designed to endure and inspire for generations to come.” said Daijiro Eguchi, Managing Director of Mitsui Fudosan (Asia). Sondris offers a rare balance of cultural richness, business connectivity, and urban convenience. Its address along Arnaiz Avenue provides immediate access to EDSA and the Skyway, connecting residents to the metro’s key business and lifestyle destinations. Its location also allows its residents to enjoy unobstructed views of the San Lorenzo Village. Inspired by Japanese sensibilities, Sondris brings together refined architecture, wellness, and environmental stewardship to create homes shaped by intention and balance. Designed by the internationally renowned architectural firm AEDAS, the 37-story tower features 252 thoughtfully designed residences, each crafted to maximize natural light, ventilation, and comfort. As with other ARTHALAND developments, Sondris targets to achieve the highest sustainability and wellness standards from both local and global organizations. It aims to become multi-certified, targeting LEED, WELL, EDGE, and BERDE certifications from the US Green Building Council, International Well Building Institute, the International Finance Corporation and the Philippine Green Building Council, respectively. ARTHALAND is the only real estate developer in the Philippines with a residential and commercial portfolio 100% certified as sustainable by local and global organizations. It has made its mark in the Philippine real estate industry by pioneering the development and management of exceptional best in-class properties that adhere to international and local standards. For more information, visit www.arthaland.com. Spotlight is BusinessWorld’s sponsored section that allows advertisers to amplify their brand and connect with BusinessWorld’s audience by publishing their stories on the BusinessWorld Web site. For more information, send an email to online@bworldonline.com. Join us on Viber at https://bit.ly/3hv6bLA to get more updates and subscribe to BusinessWorld’s titles and get exclusive content through www.bworld-x.com.
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https://www.bworldonline.com/spotlight/2026/02/02/727612/arthaland-forges-partnership-with-mitsui-fudosan-asia-for-a-premium-green-development-in-makati/
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Business & Finance
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