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Stoner ferromagnetism in a thermal pseudospin-1/2 Bose gas: We compute the finite-temperature phase diagram of a pseudospin-$1/2$ Bose
gas with contact interactions, using two complementary methods: the random
phase approximation (RPA) and self-consistent Hartree-Fock theory. We show that
the inter-spin interactions, w... | cond-mat_quant-gas |
The one-dimensional Bose gas with strong two-body losses: the effect of
the harmonic confinement: We study the dynamics of a one-dimensional Bose gas in presence of strong
two-body losses. In this dissipative quantum Zeno regime, the gas fermionises
and its dynamics can be described with a simple set of rate equation... | cond-mat_quant-gas |
Observation of microscopic confinement dynamics by a tunable topological
$θ$-angle: The topological $\theta$-angle is central to the understanding of a plethora
of phenomena in condensed matter and high-energy physics such as the strong CP
problem, dynamical quantum topological phase transitions, and the
confinement-... | cond-mat_quant-gas |
Dynamical spin-flip susceptibility for a strongly interacting ultracold
Fermi gas: The Stoner model predicts that a two-component Fermi gas at increasing
repulsive interactions undergoes a ferromagnetic transition. Using the
random-phase approximation we study the dynamical properties of the interacting
Fermi gas. Fo... | cond-mat_quant-gas |
Snell's Law for a vortex dipole in a Bose-Einstein condensate: A quantum vortex dipole, comprised of a closely bound pair of vortices of
equal strength with opposite circulation, is a spatially localized travelling
excitation of a planar superfluid that carries linear momentum, suggesting a
possible analogy with ray op... | cond-mat_quant-gas |
Many-body dynamical localization in the kicked Bose-Hubbard chain: We provide evidence that a clean kicked Bose-Hubbard model exhibits a
many-body dynamically localized phase. This phase shows ergodicity breaking up
to the largest sizes we were able to consider. We argue that this property
persists in the limit of larg... | cond-mat_quant-gas |
Correlated Quantum Dynamics of a Single Atom Collisionally Coupled to an
Ultracold Finite Bosonic Ensemble: We explore the correlated quantum dynamics of a single atom, regarded as an
open system, with a spatio-temporally localized coupling to a finite bosonic
environment. The single atom, initially prepared in a coh... | cond-mat_quant-gas |
Broad universal Feshbach resonances in the chaotic spectrum of
Dysprosium atoms: We report on the observation of weakly-bound dimers of bosonic Dysprosium
with a strong universal s-wave halo character, associated with broad magnetic
Feshbach resonances. These states surprisingly decouple from the chaotic
backgound of... | cond-mat_quant-gas |
Anderson localization of matter waves in quantum-chaos theory: We study the Anderson localization of atomic gases exposed to
three-dimensional optical speckles by analyzing the statistics of the
energy-level spacings. This method allows us to consider realistic models of
the speckle patterns, taking into account the st... | cond-mat_quant-gas |
The Gross-Pitaevskii Soliton: Relating Weakly and Strongly Repulsive
Bosonic condensates and the magnetic soliton: We show that the dark soliton of the Gross-Pitaevskii equation (GPE) that
describes the Bose-Einstein condensate (BEC) density of a system of weakly
repulsive bosons, also describes that of a system of s... | cond-mat_quant-gas |
Twisted behavior of dipolar BECs: Dipole-dipole interaction beyond the
self-consistent field approximation and exchange electric dipole interaction: Dipole-dipole interaction is a long-range interaction, hence we could expect
that the self-consistent field approximation might be applied. In most cases it
is correct, ... | cond-mat_quant-gas |
Controllable half-vortex lattices in an incoherently pumped polariton
condensate: We show how the transition between synchronized and desynchronized states of
a spinor polariton condensate can be used to drive a transition between
stationary vortex lattices and half-vortex lattices. This provides a way to
control pol... | cond-mat_quant-gas |
Polarization angle dependence of the breathing modes in confined
one-dimensional dipolar bosons: Probing the radial collective oscillation of a trapped quantum system is an
accurate experimental tool to investigate interactions and dimensionality
effects. We consider a fully polarized quasi-one dimensional dipolar qu... | cond-mat_quant-gas |
Generation of spin currents by a temperature gradient in a two-terminal
device: Theoretical and experimental studies of the interaction between spins and
temperature are vital for the development of spin caloritronics, as they
dictate the design of future devices. In this work, we propose a two-terminal
cold-atom sim... | cond-mat_quant-gas |
Superglass phase of interaction-blockaded gases on a triangular lattice: We investigate the quantum phases of monodispersed bosonic gases confined to
a triangular lattice and interacting via a class of soft-shoulder potentials.
The latter correspond to soft-core potentials with an additional hard-core
onsite interactio... | cond-mat_quant-gas |
Anyonic Haldane insulator in one dimension: We demonstrate numerically the existence of a nontrivial topological Haldane
phase for the one-dimensional extended ($U$-$V$) Hubbard model with a mean
density of one particle per site, not only for bosons but also for anyons,
despite a broken reflection parity symmetry. The ... | cond-mat_quant-gas |
Quantum fluids of light: This article reviews recent theoretical and experimental advances in the
fundamental understanding and active control of quantum fluids of light in
nonlinear optical systems. In presence of effective photon-photon interactions
induced by the optical nonlinearity of the medium, a many-photon sys... | cond-mat_quant-gas |
BEC-BCS crossover and the mobility edge: superfluid-insulator
transitions and reentrant superfluidity in disordered Fermi gases: A superfluid-insulator transition is known to occur in strongly disordered
Fermi gases, in both the BCS and BEC regimes; here, we address the properties
of this transition across the BEC-BC... | cond-mat_quant-gas |
Interaction dependent heating and atom loss in a periodically driven
optical lattice: Periodic driving of optical lattices has enabled the creation of novel
bandstructures not realizable in static lattice systems, such as topological
bands for neutral particles. However, especially driven systems of interacting
boson... | cond-mat_quant-gas |
Coupled Ferromagnetic and Nematic Ordering of Fermions in an Optical
Flux Lattice: Ultracold atoms in Raman-dressed optical lattices allow for effective
momentum-dependent interactions among single-species fermions originating from
short-range s-wave interactions. These dressed-state interactions combined with
very f... | cond-mat_quant-gas |
Dirty bosons in a three-dimensional harmonic trap: We study a three-dimensional Bose-Einstein condensate in an isotropic
harmonic trapping potential with an additional delta-correlated disorder
potential at both zero and finite temperature and investigate the emergence of
a Bose-glass phase for increasing disorder stre... | cond-mat_quant-gas |
The in-plane gradient magnetic field induced vortex lattices in
spin-orbit coupled Bose-Einstein condensations: We consider the ground-state properties of the two-component spin-orbit
coupled ultracold bosons subject to a rotationally symmetric in-plane gradient
magnetic field. In the non-interacting case, the ground... | cond-mat_quant-gas |
Localization transition in weakly-interacting Bose superfluids in
one-dimensional quasiperdiodic lattices: We study the localization of collective pair excitations in
weakly-interacting Bose superfluids in one-dimensional quasiperiodic lattices.
The localization diagram is first determined numerically. For intermedia... | cond-mat_quant-gas |
Quantum-tunneling dynamics of a spin-polarized Fermi gas in a
double-well potential: We study the exact dynamics of a one-dimensional spin-polarized gas of
fermions in a double-well potential at zero and finite temperature. Despite the
system is made of non-interacting fermions, its dynamics can be quite complex,
sho... | cond-mat_quant-gas |
Lattice Polaron in a Bose-Einstein Condensate of Hard-Core Bosons: Lattice polarons, quasiparticles arising from the interaction between an
impurity and its surrounding bosonic environment confined to a lattice system,
have emerged as a platform for generating complex few-body states, probing
many-body phenomena, and a... | cond-mat_quant-gas |
Dispersions, weights, and widths of the single-particle spectral
function in the normal phase of a Fermi gas: The dispersions, weights, and widths of the peaks of the single-particle
spectral function in the presence of pair correlations, for a Fermi gas with
either attractive or repulsive short-range inter-particle ... | cond-mat_quant-gas |
On the finite-size effects in two segregated Bose-Einstein condensates
restricted by a hard wall: The finite-size effects in two segregated Bose-Einstein condensates (BECs)
restricted by a hard wall is studied by means of the Gross-Pitaevskii equations
in the double-parabola approximation (DPA). Starting from the con... | cond-mat_quant-gas |
Long-range s-wave interactions in Bose-Einstein Condensates: An exact
correspondence between truncated free energy and dynamics: We consider the Gross-Pitaevskii(GP) model of a Bose-Einstein Condensate(BEC)
with non-local s-wave interactions. The non-locality is represented by
corrections to the local GP equation. Du... | cond-mat_quant-gas |
Realization of a sonic black hole analogue in a Bose-Einstein condensate: We have created an analogue of a black hole in a Bose-Einstein condensate. In
this sonic black hole, sound waves, rather than light waves, cannot escape the
event horizon. A step-like potential accelerates the flow of the condensate to
velocities... | cond-mat_quant-gas |
Interaction induced dynamical $\mathcal{PT}$ symmetry breaking in
dissipative Fermi-Hubbard models: We investigate the dynamical properties of one-dimensional dissipative
Fermi-Hubbard models, which are described by the Lindblad master equations with
site-dependent jump operators. The corresponding non-Hermitian effe... | cond-mat_quant-gas |
Quantum fluctuations inhibit symmetry breaking in the HMF model: It is widely believed that mean-field theory is exact for a wide-range of
classical long-range interacting systems. Is this also true once quantum
fluctuations have been accounted for? As a test case we study the Hamiltonian
Mean Field (HMF) model for a s... | cond-mat_quant-gas |
Three-body correlations in a two-dimensional SU(3) Fermi gas: We consider a three-component Fermi gas that has SU(3) symmetry and is
confined to two dimensions (2D). For realistic cold atomic gas experiments, we
show that the phase diagram of the quasi-2D system can be characterized using
two 2D scattering parameters: ... | cond-mat_quant-gas |
Extended Bose-Hubbard models with Rydberg macrodimer dressing: Extended Hubbard models have proven to bear novel quantum states, but their
experimental realization remains challenging. In this work we propose to use
bosonic quantum gases dressed with molecular bound states in Rydberg
interaction potentials for the obse... | cond-mat_quant-gas |
Diagrammatic Monte Carlo algorithm for the resonant Fermi gas: We provide a description of a diagrammatic Monte Carlo algorithm for the
resonant Fermi gas in the normal phase. Details are given on diagrammatic
framework, Monte Carlo moves, and incorporation of ultraviolet asymptotics.
Apart from the self-consistent bol... | cond-mat_quant-gas |
Many-body excitations and de-excitations in trapped ultracold bosonic
clouds: We employ the MultiConfiguraional Time-Dependent Hartree for Bosons (MCTDHB)
method to study excited states of interacting Bose-Einstein condensates
confined by harmonic and double-well trap potentials. Two approaches to access
excitations,... | cond-mat_quant-gas |
Exotic Superfluid Phases in Spin Polarized Systems on Optical Lattices: Leveraging cutting-edge numerical methodologies, we study the ground state of
the two-dimensional spin-polarized Fermi gas in an optical lattice. We focus on
systems at high density and small spin polarization, corresponding to the
parameter regime... | cond-mat_quant-gas |
Non-integrable dynamics of matter-wave solitons in a density-dependent
gauge theory: We study interactions between bright matter-wave solitons which acquire
chiral transport dynamics due to an optically-induced density-dependent gauge
potential. Through numerical simulations, we find that the collision dynamics
featu... | cond-mat_quant-gas |
Verifying the observer dependence of quasiparticle counts in the
analogue gravity of dilute ultracold quantum gases: The quasiparticle content of a quantum field depends on the observer, in
particular on its motional state, on the way the observer's detector couples to
the quantum field, and on the frequency standard... | cond-mat_quant-gas |
2DEG on a cylindrical shell with a screw dislocation: A two dimensional electron gas on a cylindrical surface with a screw
dislocation is considered. More precisely, we investigate how both the geometry
and the deformed potential due to a lattice distortion affect the Landau levels
of such system. The case showing the ... | cond-mat_quant-gas |
Rectification in Nonequilibrium Steady States of Open Many-Body Systems: We study how translationally invariant couplings of many-particle systems and
nonequilibrium baths can be used to rectify particle currents, for which we
consider minimal setups to realize bath-induced currents in nonequilibrium
steady states of o... | cond-mat_quant-gas |
Role of spatial inhomogeneity in dissociation of trapped molecular
condensates: We theoretically analyze dissociation of a harmonically trapped Bose-Einstein
condensate of molecular dimers and examine how the spatial inhomogeneity of the
molecular condensate affects the conversion dynamics and the atom-atom pair
corr... | cond-mat_quant-gas |
Time-resolved density correlations as probe of squeezing in toroidal
Bose-Einstein condensates: I study the evolution of mean field and linear quantum fluctuations in a
toroidal Bose-Einstein condensate, whose interaction strength is quenched from
a finite (repulsive) value to zero. The azimuthal equal-time density-d... | cond-mat_quant-gas |
Mixed triplet and singlet pairing in multicomponent ultracold fermion
systems with dipolar interactions: The symmetry properties of the Cooper pairing problem for multi-component
ultra-cold dipolar molecular systems are investigated. The dipolar anisotropy
provides a natural and robust mechanism for both triplet and ... | cond-mat_quant-gas |
Design of laser-coupled honeycomb optical lattices supporting Chern
insulators: We introduce an explicit scheme to realize Chern insulating phases employing
cold atoms trapped in a state-dependent optical lattice and laser-induced
tunneling processes. The scheme uses two internal states, a ground state and a
long-liv... | cond-mat_quant-gas |
Beyond-mean-field stochastic corrections to the blueshift of a
driven-dissipative exciton-polariton condensate: In the absence of vortices or phase slips, the phase dynamics of
exciton-polariton condensates was shown to map onto the Kardar-Parisi-Zhang
(KPZ) equation, which describes the stochastic growth of a classi... | cond-mat_quant-gas |
Analytical results for Josephson dynamics of ultracold Bosons: We study the dynamics of ultracold Bosons in a double-well potential within
the two-mode Bose-Hubbard model by means of semiclassical methods. By applying
a WKB quantization we find analytical results for the energy spectrum, which
are in excellent agreemen... | cond-mat_quant-gas |
Oblique Half-Solitons and their Generation in Exciton-Polariton
Condensates: We describe oblique half-solitons, a new type of topological defects in a two
dimensional spinor Bose Einstein condensate. A realistic protocol based on the
optical spin Hall effect is proposed toward their generation within an
exciton-polar... | cond-mat_quant-gas |
Bose-Einstein Condensation in a Plasmonic Lattice: Bose-Einstein condensation is a remarkable manifestation of quantum
statistics and macroscopic quantum coherence. Superconductivity and
superfluidity have their origin in Bose-Einstein condensation. Ultracold
quantum gases have provided condensates close to the origina... | cond-mat_quant-gas |
Laser cooling to quantum degeneracy: We report on Bose-Einstein condensation (BEC) in a gas of strontium atoms,
using laser cooling as the only cooling mechanism. The condensate is formed
within a sample that is continuously Doppler cooled to below 1\muK on a
narrow-linewidth transition. The critical phase-space densit... | cond-mat_quant-gas |
Incommensurability effects on dipolar bosons in optical lattices: We present a study that investigated a quantum dipolar gas in continuous
space where a potential lattice was imposed. Employing exact quantum Monte
Carlo techniques, we analysed the ground state properties of the scrutinised
system, varying the lattice d... | cond-mat_quant-gas |
Vortex dynamics and skyrmions in four to six dimensions: Coherence
vortices in Bose-Einstein condensates: I point out how coherence vortices, i.e., topological defects in a
correlation function, could help explore new physics if they are created in
matter waves. Vortex dynamics could be studied in up to six dimension... | cond-mat_quant-gas |
Highly polarized Fermi gases in two dimensions: We investigate the highly polarized limit of a two-dimensional (2D) Fermi
gas, where we effectively have a single spin-down impurity atom immersed in a
spin-up Fermi sea. By constructing variational wave functions for the impurity,
we map out the ground state phase diagra... | cond-mat_quant-gas |
Low-energy prethermal phase and crossover to thermalization in nonlinear
kicked rotors: In the presence of interactions, periodically-driven quantum systems
generically thermalize to an infinite-temperature state. Recently, however, it
was shown that in random kicked rotors with local interactions, this long-time
equ... | cond-mat_quant-gas |
A mobile ion in a Fermi sea: The remarkable single particle control of individual ions combined with the
versatility of ultracold atomic gases makes hybrid ion-atom system an exciting
new platform for quantum simulation of few- and many-body quantum physics.
Here, we study theoretically the properties of a mobile ion i... | cond-mat_quant-gas |
Self-consistent Description of Bose-Bose Droplets: Modified Gapless
Hartree-Fock-Bogoliubov Method: We define a formalism of a self-consistent description of the ground state of
a weakly interacting Bose system, accounting for higher order terms in
expansion of energy in the diluteness parameter. The approach is desi... | cond-mat_quant-gas |
Scattering of matter wave solitons on localized potentials: We present numerical and analytical results for the reflection and
transmission properties of matter wave solitons impinging on localized
scattering potentials in one spatial dimension. Our mean field analysis
identifies regimes where the solitons behave more ... | cond-mat_quant-gas |
Topological charge pumping of bound bosonic pairs: Experiments with bosonic atoms in optical superlattices allow for the
interesting possibility to study the adiabatic quantized pumping of bosonic
atoms in the presence of interactions. We investigate this exotic phenomenon
for bound bosonic pairs in the paradigmatic Su... | cond-mat_quant-gas |
Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases: We study the collapse of ultracold fermionic gases into inhomogeneous states
due to strong dipolar interaction in both 2D and 3D. Depending on the
dimensionality, we find that two different types of inhomogeneous states are
stabilized once the dipole mo... | cond-mat_quant-gas |
Stabilization of a nonlinear bullet coexisting with a Bose-Einstein
condensate in a rapidly cooled magnonic system driven by a spin-orbit torque: We have recently shown that injection of magnons into a magnetic dielectric
via the spin-orbit torque (SOT) effect in the adjacent layer of a heavy metal
subjected to the a... | cond-mat_quant-gas |
Quantum criticality of a Bose gas in an optical lattice near the Mott
transition: We derive the equation of state of bosons in an optical lattice in the
framework of the Bose-Hubbard model. Near the density-driven Mott transition,
the expression of the pressure P({\mu},T) versus chemical potential and
temperature is ... | cond-mat_quant-gas |
Origin and evolution of the multiply-quantised vortex instability: We show that the dynamical instability of quantum vortices with more than a
single quantum of angular momentum results from a superradiant bound state
inside the vortex core. Our conclusion is supported by an analytic WKB
calculation and numerical simul... | cond-mat_quant-gas |
Exciton-polariton X-waves in a microcavity: We investigate the possibility of creating X-waves, or localized wave
packets, in resonantly excited exciton-polariton superfluids. We demonstrate
the existence of X-wave traveling solutions in the coupled exciton-photon
system past the inflection point, where the effective m... | cond-mat_quant-gas |
Gapped spectrum in pair-superfluid bosons: We study the ground state of a bilayer system of dipolar bosons with dipoles
oriented by an external field perpendicularly to the two parallel planes. By
decreasing the interlayer distance, for a fixed value of the strength of the
dipolar interaction, the system undergoes a qu... | cond-mat_quant-gas |
Effective dynamics of a tracer particle in a dense homogeneous quantum
gas: We investigate the mean field regime of the dynamics of a tracer particle in
a homogenous quantum gas. For a bosonic gas, we show that this regime is
constrained by the well known requirement of an appropriate mean field scaling
of the intera... | cond-mat_quant-gas |
Role of conservation laws in the Density Matrix Renormalization Group: We explore matrix product state approximations to wavefunctions which have
spontaneously broken symmetries or are critical. We are motivated by the fact
that symmetries, and their associated conservation laws, lead to block-sparse
matrix product sta... | cond-mat_quant-gas |
Quantum anomaly and 2D-3D crossover in strongly interacting Fermi gases: We present an experimental investigation of collective oscillations in
harmonically trapped Fermi gases through the crossover from two to three
dimensions. Specifically, we measure the frequency of the radial monopole or
breathing mode as a functi... | cond-mat_quant-gas |
Atom chips with two-dimensional electron gases: theory of near surface
trapping and ultracold-atom microscopy of quantum electronic systems: We show that current in a two-dimensional electron gas (2DEG) can trap
ultracold atoms $<1 \mu$m away with orders of magnitude less spatial noise than
a metal trapping wire. Thi... | cond-mat_quant-gas |
Magnon Bose-Einstein condensates: from time crystals and quantum
chromodynamics to vortex sensing and cosmology: Under suitable experimental conditions collective spin-wave excitations,
magnons, form a Bose-Einstein condensate (BEC) where the spins precess with a
globally coherent phase. Bose-Einstein condensation of... | cond-mat_quant-gas |
Reactive collisions in confined geometries: We consider low energy threshold reactive collisions of particles interacting
via a van der Waals potential at long range in the presence of external
confinement and give analytic formulas for the confinement modified scattering
in such circumstances. The reaction process is ... | cond-mat_quant-gas |
Exact quantum dynamics of yrast states in the finite 1D Bose gas: We demonstrate that the quantum dynamics of yrast states in the
one-dimensional (1D) Bose gas gives an illustrative example to equilibration of
an isolated quantum many-body system. We first formulate the energy spectrum of
yrast states in terms of the d... | cond-mat_quant-gas |
Mean-field dynamics of a Bose-Hubbard chain coupled to a non-Markovian
environment: We study the dynamics of an interacting Bose-Hubbard chain coupled to a
non-Markovian environment. Our basic tool is the reduced generating functional
expressed as a path integral over spin-coherent states. We calculate the
leading co... | cond-mat_quant-gas |
The decay and collisions of dark solitons in superfluid Fermi gases: We study soliton collisions and the decay of solitons into sound in
superfluid Fermi gases across the Bose-Einstein condensate to
Bardeen-Cooper-Schrieffer (BEC-BCS) crossover by performing numerical
simulations of the time-dependent Bogoliubov-de Gen... | cond-mat_quant-gas |
Truncation effects in the charge representation of the O(2) model: The O(2) model in Euclidean space-time is the zero-gauge-coupling limit of
the compact scalar quantum electrodynamics. We obtain a dual representation of
it called the charge representation. We study the quantum phase transition in
the charge representa... | cond-mat_quant-gas |
Three-body interaction effects on the ground state of one-dimensional
anyons: A quantum phase transition driven by the statistics was observed in an
anyon-Hubbard model with local three-body interactions. Using a fractional
Jordan-Wigner transformation, we arrived at a modified Bose-Hubbard model,
which exhibits Mott... | cond-mat_quant-gas |
Non equilibrium phase transitions and Floquet Kibble-Zurek scaling: We study the slow crossing of non-equilibrium quantum phase transitions in
periodically-driven systems. We explicitly consider a spin chain with a uniform
time-dependent magnetic field and focus on the Floquet state that is
adiabatically connected to t... | cond-mat_quant-gas |
Thermodynamics of rotating Bose gases in a trap: Novel ground state properties of rotating Bose gases have been intensively
studied in the context of neutral cold atoms. We investigate the rotating Bose
gas in a trap from a thermodynamic perspective, taking the charged ideal Bose
gas in magnetic field (which is equival... | cond-mat_quant-gas |
Emergent spacetimes from Hermitian and non-Hermitian quantum dynamics: We show that quantum dynamics of any systems with $SU(1,1)$ symmetry give
rise to emergent Anti-de Sitter spacetimes in 2+1 dimensions (AdS$_{2+1}$).
Using the continuous circuit depth, a quantum evolution is mapped to a
trajectory in AdS$_{2+1}$. W... | cond-mat_quant-gas |
Active Learning Approach to Optimization of Experimental Control: In this work we present a general machine learning based scheme to optimize
experimental control. The method utilizes the neural network to learn the
relation between the control parameters and the control goal, with which the
optimal control parameters ... | cond-mat_quant-gas |
Interaction-induced dynamical phase locking of Bose-Einstein condensates: We show that interactions result in the emergence of a {\it definite}
relative-phase between two initially incoherent Bose-Einstein condensates. The
many-realization interference fringe visibility is universal at
$g_{12}^{(1)}\sim1/3$ throughout ... | cond-mat_quant-gas |
Stable p-wave resonant two-dimensional Fermi-Bose dimers: We consider two-dimensional weakly-bound heterospecies molecules formed in a
Fermi-Bose mixture with attractive Fermi-Bose and repulsive Bose-Bose
interactions. Bosonic exchanges lead to an intermolecular attraction, which can
be controlled and tuned to a p-wave... | cond-mat_quant-gas |
Dynamical emergence of a Kosterlitz-Thouless transition in a disordered
Bose gas following a quench: We study the dynamical evolution of a two-dimensional Bose gas after a
disorder potential quench. Depending on the initial conditions, the system
evolves either to a thermal or a superfluid state. Using extensive quas... | cond-mat_quant-gas |
Beyond Gross-Pitaevskii equation for 1D gas: quasiparticles and solitons: Describing properties of a strongly interacting quantum many-body system
poses a serious challenge both for theory and experiment. In this work, we
study excitations of one-dimensional repulsive Bose gas for arbitrary
interaction strength using a... | cond-mat_quant-gas |
Eigenmodal Analysis of Anderson Localization: Applications to Photonic
Lattices and Bose-Einstein Condensates: We present the eigenmodal analysis techniques enhanced towards calculations
of optical and non-interacting Bose-Einstein condensate (BEC) modes formed by
random potentials and localized by Anderson effect. T... | cond-mat_quant-gas |
Properties of 2D and Quasi-2D Dipolar Bosons with Non-zero Tilt Angles
at T=0: Recent experimental advances in creating stable dipolar bosonic systems,
including polar molecules with large electric dipole moments, have led to
vigorous theoretical activities. Recent reporting of observation of roton
feature in dipolar... | cond-mat_quant-gas |
Tunnel-coupled optical microtraps for ultracold atoms: Arrays of individual atoms trapped in optical microtraps with
micrometer-scale sizes have emerged as a fundamental, versatile, and powerful
platform for quantum sciences and technologies. This platform enables the
bottom-up engineering of quantum systems, offering ... | cond-mat_quant-gas |
Quantum spiral spin-tensor magnetism: The characterization of quantum magnetism in a large spin ($\geq 1$) system
naturally involves both spin-vectors and -tensors. While certain types of
spin-vector (e.g., ferromagnetic, spiral) and spin-tensor (e.g., nematic in
frustrated lattices) orders have been investigated separ... | cond-mat_quant-gas |
Microscopic picture of superfluid $^4$He: We elucidate the microscopic quantum mechanism of superfluid $^4$He by
uncovering a novel characteristic of its many-body energy levels. At
temperature below the transition point, the system's low-lying levels exhibit a
fundamental grouping behavior, wherein each level belongs ... | cond-mat_quant-gas |
Role of higher-order interactions on the modulational instability of
Bose-Einstein condensate trapped in a periodic optical lattice: In this paper, we investigate the impact of higher-order interactions on the
modulational instability (MI) of Bose-Einstein Condensates (BECs) immersed in
an optical lattice potential. ... | cond-mat_quant-gas |
A Proposal for measuring Anisotropic Shear Viscosity in Unitary Fermi
Gases: We present a proposal to measure anisotropic shear viscosity in a strongly
interacting, ultra-cold, unitary Fermi gas confined in a harmonic trap. We
introduce anisotropy in this setup by strongly confining the gas in one of the
directions w... | cond-mat_quant-gas |
Dimensional Effects on the Momentum distribution of Bosonic Trimer
States: The momentum distribution is a powerful probe of strongly-interacting systems
that are expected to display universal behavior. This is contained in the
contact parameters which relate few- and many-body properties. Here we consider
a Bose gas ... | cond-mat_quant-gas |
Spin-incoherent Luttinger liquid of one-dimensional spin-1
Tonks-Girardeau Bose gas: Spin-dependent properties: Spin-incoherent Luttinger liquid (SILL) is a different universal class from
the Luttinger liquid.\ This difference results from the spin incoherence of the
system when the thermal energy of the system is hi... | cond-mat_quant-gas |
The self-energy of an impurity in an ideal Fermi gas to second order in
the interaction strength: We study in three dimensions the problem of a spatially homogeneous
zero-temperature ideal Fermi gas of spin-polarized particles of mass $m$
perturbed by the presence of a single distinguishable impurity of mass $M$. The... | cond-mat_quant-gas |
Slow quench dynamics of periodically driven quantum gases: We study the evolution of bosons in a periodically driven optical lattice
during a slow change of the driving amplitude. Both the regime of high
frequency and low frequency driving are investigated. In the low frequency
regime, resonant absorption of energy is ... | cond-mat_quant-gas |
Dynamical self-stabilization of the Mott insulator: Time evolution of
the density and entanglement entropy of out-of-equilibrium cold fermion gases: The time evolution of the out-of-equilibrium Mott insulator is investigated
numerically through calculations of space-time resolved density and entropy
profiles resultin... | cond-mat_quant-gas |
Observation of quasiparticle pair-production and quantum entanglement in
atomic quantum gases quenched to an attractive interaction: We report observation of quasiparticle pair-production and characterize
quantum entanglement created by a modulational instability in an atomic
superfluid. By quenching the atomic inter... | cond-mat_quant-gas |
Non-local correlation and entanglement of ultracold bosons in the
two-dimensional Bose-Hubbard lattice at finite temperature: We investigate the temperature-dependent behavior emerging in the vicinity of
the superfluid (SF) to Mott-insulator (MI) transition of interacting bosons in
a two-dimensional optical lattice, ... | cond-mat_quant-gas |
Band-gap structure and chiral discrete solitons in optical lattices with
artificial gauge fields: We study three-leg-ladder optical lattices loaded with repulsive atomic
Bose-Einstein condensates and subjected to artificial gauge fields. By
employing the plane-wave analysis and variational approach, we analyze the
ba... | cond-mat_quant-gas |
Phases, transitions, and boundary conditions in a model of interacting
bosons: We carry out an extensive study of the phase diagrams of the extended Bose
Hubbard model, with a mean filling of one boson per site, in one dimension by
using the density matrix renormalization group and show that it contains
Superfluid (S... | cond-mat_quant-gas |
Experimental realization of ultracold Yb-$^{7}{\rm Li}$ mixtures in
mixed dimensions: We report on the experimental realization of ultracold $^{174}{\rm
Yb}$-$^{7}{\rm Li}$ (Boson-Boson) and $^{173}{\rm Yb}$-$^{7}{\rm Li}$
(Fermion-Boson) mixtures. They are loaded into three dimensional (3D) or one
dimensional (1D) o... | cond-mat_quant-gas |
Second-order response theory of radio-frequency spectroscopy for cold
atoms: We present a theoretical description of the radio-frequency (rf) spectroscopy
of fermionic atomic gases, based on the second-order response theory at finite
temperature. This approach takes into account the energy resolution due to the
envel... | cond-mat_quant-gas |
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