abstract stringlengths 3 192k | title stringlengths 4 857 |
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gravitational waves emitted by black hole binary inspiral and mergers enable unprecedented strong-field tests of gravity, requiring accurate theoretical modeling of the expected signals in extensions of general relativity. in this paper we model the gravitational wave emission of inspiralling binaries in scalar gauss-b... | post-newtonian gravitational and scalar waves in scalar-gauss-bonnet gravity |
in this paper, we investigate the topological numbers for the singly rotating kerr black holes in all dimensions and the four-dimensional kerr-newman black hole. we show that for uncharged black holes, the rotation parameter has a significant effect on the topological number, and for rotating black holes, the dimension... | topological classes of rotating black holes |
the complexity of quantum states has become a key quantity of interest across various subfields of physics, from quantum computing to the theory of black holes. the evolution of generic quantum systems can be modelled by considering a collection of qubits subjected to sequences of random unitary gates. here we investig... | linear growth of quantum circuit complexity |
in this paper we study the two-body gravitational scattering of massive scalars with different masses in general spacetime dimensions. we focus on the regge limit (eikonal regime) of the resulting scattering amplitudes and discuss how to extract the classical information representing the scattering of two black holes. ... | revisiting the second post-minkowskian eikonal and the dynamics of binary black holes |
recently there has been a surge of interest in regularizing, a d → 4 limit of, the einstein-gauss-bonnet (egb) gravity, and the resulting regularized 4d egb gravity has nontrivial dynamics. the theory admits spherically symmetric black holes generalizing the schwarzschild black holes. we consider the rotating black hol... | rotating black holes in 4d einstein-gauss-bonnet gravity and its shadow |
we present a novel study of kerr compton amplitudes in a partial wave basis in terms of the nekrasov-shatashvili (ns) function of the \textit{confluent heun equation} (che). remarkably, ns-functions enjoy analytic properties and symmetries that are naturally inherited by the compton amplitudes. based on this, we charac... | black hole perturbation theory meets cft$_2$: kerr compton amplitudes from nekrasov-shatashvili functions |
chaos and complexity entail an entropic and computational obstruction to describing a system, and thus are intrinsically difficult to characterize. in this paper, we consider time evolution by gaussian unitary ensemble (gue) hamiltonians and analytically compute out-of-time-ordered correlation functions (otocs) and fra... | chaos, complexity, and random matrices |
the effect of a cft shockwave on the entanglement structure of an eternal black hole in jackiw-teitelboim gravity, that is in thermal equilibrium with a thermal bath, is considered. the shockwave carries energy and entropy into the black hole and heats the black hole up leading to evaporation and the eventual recovery ... | islands and page curves for evaporating black holes in jt gravity |
for black hole evaporation to be unitary, the naive density matrix of hawking radiation needs to be corrected with a sprinkling of pseudorandom "noise." using wormholes, semiclassical gravity appears to describe an averaged "true random" theory of this noise. we discuss the wormholes in dilaton gravity theories with ma... | more quantum noise from wormholes |
it was shown recently that the static tidal response coefficients, called love numbers, vanish identically for kerr black holes in four dimensions. in this work, we confirm this result and extend it to the case of spin-0 and spin-1 perturbations. we compute the static response of kerr black holes to scalar, electromagn... | on the vanishing of love numbers for kerr black holes |
for ultra compact objects, light rings and fundamental photon orbits (fpos) play a pivotal role in the theoretical analysis of strong gravitational lensing effects, and of bh shadows in particular. in this short review, specific models are considered to illustrate how fpos can be useful in order to understand some non-... | shadows and strong gravitational lensing: a brief review |
a novel 4d einstein-gauss-bonnet gravity was recently formulated by glavan and lin [phys. rev. lett. 124, 081301 (2020)]. although this theory may run into trouble at the level of action or equations of motion, the spherically symmetric black hole solution, which can be successfully reproduced in those consistent theor... | greybody factor and power spectra of the hawking radiation in the 4d einstein-gauss-bonnet de-sitter gravity |
asymptotic causal diamonds (acds) are a natural flat space analogue of ads causal wedges, and it has been argued previously that they may be useful for understanding bulk locality in flat space holography. in this paper, we use acd-inspired ideas to argue that there exist natural candidates for quantum extremal surface... | page curve and the information paradox in flat space |
we present the derivation of the third subleading order (n3lo) spin-orbit interaction at the state of the art of post-newtonian (pn) gravity via the eft of spinning objects. the present sector contains the largest and most elaborate collection of feynman graphs ever tackled to date in sectors with spin, and in all pn s... | n3lo spin-orbit interaction via the eft of spinning gravitating objects |
we extend the semianalytic technique of iyer and will for computing the complex quasinormal frequencies of black holes, ω , by constructing the padé approximants of the (formal) series for ω2. it is shown that for the (so-far best documented) quasinormal frequencies of the schwarzschild and reissner-nordström black hol... | quasinormal modes of black holes: the improved semianalytic approach |
we rewrite the chern-simons description of pure gravity on global ads3 and on euclidean btz black holes as a quantum field theory on the ads boundary. the resulting theory is (two copies of) the path integral quantization of a certain coadjoint orbit of the virasoro group, and it should be regarded as the quantum field... | a theory of reparameterizations for ads3 gravity |
we discuss static spherically symmetric metrics which represent nonsingular black holes in four- and higher-dimensional spacetime. we impose a set of restrictions, such as a regularity of the metric at the center r =0 and schwarzschild asymptotic behavior at large r . we assume that the metric besides mass m contains a... | notes on nonsingular models of black holes |
the weak gravity conjecture postulates the existence of superextremal charged particles, i.e. those with mass smaller than or equal to their charge in planck units. we present further evidence for our recent observation that in known examples a much stronger statement is true: an infinite tower of superextremal particl... | evidence for a sublattice weak gravity conjecture |
could it be that the matter from the electrons in high tc superconductors is of a radically new kind that may be called "many body entangled compressible quantum matter"? much of this text is intended as an easy to read tutorial, explaining recent theoretical advances that have been unfolding at the cross roads of cond... | planckian dissipation, minimal viscosity and the transport in cuprate strange metals |
we show that the asymptotic symmetries close to nonextremal black hole horizons are generated by an extension of supertranslations. this group is generated by a semidirect sum of virasoro and abelian currents. the charges associated with the asymptotic killing symmetries satisfy the same algebra. when considering the s... | supertranslations and superrotations at the black hole horizon |
we formulate an effective field theory describing large mass scalars and fermions minimally coupled to gravity. the operators of this effective field theory are organized in powers of the transfer momentum divided by the mass of the matter field, an expansion which lends itself to the efficient extraction of classical ... | heavy black hole effective theory |
we prove the following theorem: axisymmetric, stationary solutions of the einstein field equations formed from classical gravitational collapse of matter obeying the null energy condition, that are everywhere smooth and ultracompact (i.e., they have a light ring) must have at least two light rings, and one of them is s... | light-ring stability for ultracompact objects |
we study the entanglement islands and subsystem volume complexity corresponding to the left/ right entanglement of a conformal defect in d-dimensions in randall-sundrum (rs) braneworld model with subcritical tension brane. the left and right modes of the defect mimic the eternal black hole and radiation system respecti... | islands and complexity of eternal black hole and radiation subsystems for a doubly holographic model |
we explain how the lowest-order classical gravitational radiation produced during the inelastic scattering of two schwarzschild black holes in general relativity can be obtained from a tree scattering amplitude in gauge theory coupled to scalar fields. the gauge calculation is related to gravity through the double copy... | inelastic black hole scattering from charged scalar amplitudes |
we introduce deep learning models to estimate the masses of the binary components of black hole mergers, $(m_1,m_2)$ (m1,m2) , and three astrophysical properties of the post-merger compact remnant, namely, the final spin, $a_\mathrm f$ af , and the frequency and damping time of the ringdown oscillations of the fundamen... | statistically-informed deep learning for gravitational wave parameter estimation |
we investigate how a spherically symmetric fluid modifies the schwarzschild vacuum solution when there is no exchange of energy-momentum between the fluid and the central source of the schwarzschild metric. this system is described by means of the gravitational decoupling realised via the minimal geometric deformation ... | black holes by gravitational decoupling |
quantitative tools for measuring the propagation of information through quantum many-body systems, originally developed to study quantum chaos, have recently found many new applications from black holes to disordered spin systems. | unscrambling the physics of out-of-time-order correlators |
we prove that higher-dimension operators contribute positively to the entropy of a thermodynamically stable black hole at fixed mass and charge. our results apply whenever the dominant corrections originate at tree level from quantum field theoretic dynamics. more generally, positivity of the entropy shift is equivalen... | proof of the weak gravity conjecture from black hole entropy |
structure at the horizon scale of black holes would give rise to echoes of the gravitational wave signal associated with the postmerger ringdown phase in binary coalescences. we study the waveform of echoes in static and stationary, traversable wormholes in which perturbations are governed by a symmetric effective pote... | echoes of kerr-like wormholes |
we prove a version of the weak gravity conjecture for 6d f-theory or heterotic string compactifications with 8 supercharges. this sharpens our previous analysis by including massless scalar fields. the latter are known to modify the weak gravity conjecture bound in two a priori independent ways: first, the extremality ... | a stringy test of the scalar weak gravity conjecture |
the eikonal approximation is an ideal tool to extract classical observables in gauge theory and gravity directly from scattering amplitudes. here we consider effective theories of gravity where in addition to the einstein-hilbert term we include nonminimal couplings of the type r3, r4 and ffr. in particular, we study t... | eikonal phase matrix, deflection angle, and time delay in effective field theories of gravity |
our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the event horizon telescope (eht). we use here the m87* shadow size to infer constraints on the physical charges of a large variety of nonrotating or rotating black holes. for example, we show ... | constraints on black-hole charges with the 2017 eht observations of m87* |
we advance two alternative proposals for the island contributions to the entanglement negativity of various pure and mixed state configurations in quantum field theories coupled to semiclassical gravity. the first construction involves the extremization of an algebraic sum of the generalized renyi entropies of order ha... | islands for entanglement negativity |
we apply the recently proposed quantum extremal surface construction to calculate the page curve of the eternal reissner-nordström black holes in four dimensions ignoring the backreaction and the greybody factor. without the island, the entropy of hawking radiation grows linearly with time, which results in the informa... | islands and page curves of reissner-nordström black holes |
we compute the conservative two-body hamiltonian of a compact binary system with a spinning black hole through o (g3) to all orders in velocity, including linear and quadratic spin terms. to obtain our results we calculate the classical limit of the two-loop amplitude for the scattering of a massive scalar particle wit... | conservative binary dynamics with a spinning black hole at o (g3) from scattering amplitudes |
observers in de sitter space can only access the space up to their cosmological horizon. assuming thermal equilibrium, we use the quantum ryu-takayanagi or island formula to compute the entanglement entropy between the states inside the cosmological horizon and states outside, as a function of time. we obtain a page cu... | pure de sitter space and the island moving back in time |
we define a new information theoretic quantity called odd entanglement entropy (oee) which enables us to compute the entanglement wedge cross section in holographic conformal field theories (cfts). the entanglement wedge cross section has been introduced as a minimal cross section of the entanglement wedge, a natural g... | entanglement wedge cross section from the dual density matrix |
"do carroll particles move?" the answer depends on the characteristics of the particle such as its mass, spin, electric charge, and magnetic moment. a massive carroll particle (closely related to fractons) does not move; its immobility follows from carroll boost symmetry which implies dipole conservation, but not conve... | hall motions in carroll dynamics |
we show that the presence of replica wormholes in the euclidean path integral of gravity leads to a non-perturbative violation of charge conservation for any global symmetry present in the low-energy description of quantum gravity. explicitly, we compute the scattering probability between different charged states in se... | a violation of global symmetries from replica wormholes and the fate of black hole remnants |
the quantum field-theoretic approach to classical observables due to kosower, maybee and o'connell provides a rigorous pathway from on-shell scattering amplitudes to classical perturbation theory. in this paper, we promote this formalism to describe general classical spinning objects by using coherent spin states. our ... | classical observables from coherent-spin amplitudes |
the dynamics of a nearly-ads2 spacetime with boundaries is reduced to that of two particles in the anti-de sitter space. we determine the class of physically meaningful wavefunctions, and prescribe the statistical mechanics of a black hole. we demonstrate how wavefunctions for a two-sided black hole and a regularized n... | statistical mechanics of a two-dimensional black hole |
we investigated the superradiance and stability of the regularized 4d charged einstein-gauss-bonnet black hole which is recently inspired by glavan and lin [phys. rev. lett. 124, 081301 (2020)]. we found that the positive gauss-bonnet coupling constant α enhances the superradiance, while the negative α suppresses it. t... | superradiance and stability of the regularized 4d charged einstein-gauss-bonnet black hole |
recently a new class of scalarized black holes in einstein-gauss-bonnet (egb) theories was discovered. what is special for these black hole solutions is that the scalarization is not due to the presence of matter, but it is induced by the curvature of spacetime itself. moreover, more than one branch of scalarized solut... | radial perturbations of the scalarized einstein-gauss-bonnet black holes |
it has long been conjectured that the large n deconfinement phase transition of n = 4 su(n) super-yang-mills corresponds via ads/cft to the hawking-page transition in which black holes dominate the thermal ensemble, and quantitative evidence of this has come through the recent matching of the superconformal index of 1/... | probing supersymmetric black holes with surface defects |
we continue to investigate correspondences between, on the one hand, scattering amplitudes for massive higher-spin particles and gravitons in appropriate quantum-to-classical limits, and on the other hand, classical gravitational interactions of spinning black holes according to general relativity. we first construct a... | scattering in black hole backgrounds and higher-spin amplitudes: part ii |
we construct an infinite family of microstates with geometric interiors for eternal black holes in general relativity with negative cosmological constant in any dimension. wormholes in the euclidean path integral for gravity cause these states to have small, but non-zero, quantum mechanical overlaps that have a univers... | microscopic origin of the entropy of black holes in general relativity |
a perturbed black hole rings down by emitting gravitational waves in tones with specific frequencies and durations. such tones encode prized information about the geometry of the source spacetime and the fundamental nature of gravity, making the measurement of black hole ringdowns a key goal of gravitational wave astro... | analyzing black-hole ringdowns |
searching for violations of the no-hair theorem (nht) is a powerful way to test gravity, and more generally fundamental physics, particularly with regards to the existence of additional scalar fields. the first observation of a black hole (bh) shadow by the event horizon telescope (eht) has opened a new direct window o... | black holes with scalar hair in light of the event horizon telescope |
in this paper, we discuss the effects of nonlinear electrodynamics (ned) on non-rotating black holes, parametrized by the field coupling parameter β and magnetic charge parameter p in detail. particularly, we survey a large range of observables and physical properties of the magnetically charged black hole, including t... | nonlinear electrodynamics effects on the black hole shadow, deflection angle, quasinormal modes and greybody factors |
magnetic reconnection can power bright, rapid flares originating from the inner magnetosphere of accreting black holes. we conduct extremely high-resolution (5376 × 2304 × 2304 cells) general-relativistic magnetohydrodynamics simulations, capturing plasmoid-mediated reconnection in a 3d magnetically arrested disk for t... | black hole flares: ejection of accreted magnetic flux through 3d plasmoid-mediated reconnection |
we explore conformal primary wave functions for all half integer spins up to the graviton. half steps are related by supersymmetry, integer steps by the classical double copy. the main results are as follows: we 1) introduce a convenient spin frame and null tetrad to organize all radiative modes of varying spin; 2) ide... | shifting spin on the celestial sphere |
recent progress in our understanding of the black hole information paradox has lead to a new prescription for calculating entanglement entropies, which involves special subsystems in regions where gravity is dynamical, called quantum extremal islands. we present a simple holographic framework where the emergence of qua... | quantum extremal islands made easy. part i. entanglement on the brane |
a charged rotating black hole in f(r) gravity is characterized by mass, m, spin, a, electric charge, q, and r0 which is proportional to cosmological constant. we analyze the image of the black hole shadow in four types (1) at r →∞ , (2) at r →ro in vacuum, (3) at r →∞ and (4) at r →ro for an observer at the presence of... | shadow of a charged rotating black hole in f(r) gravity |
we study shadows cast by a certain class of rotating wormholes and point out the crucial role of a rotating wormhole throat in the formation of a shadow. overlooking this crucial role of a wormhole throat has resulted in incomplete results in the previous studies on shadows of the same class of rotating wormholes. we e... | shadows of rotating wormholes |
we reformulate the scattering amplitudes of 4d flat space gauge theory and gravity in the language of a 2d cft on the celestial sphere. the resulting cft structure exhibits an ope constructed from 4d collinear singularities, as well as infinite-dimensional kac-moody and virasoro algebras encoding the asymptotic symmetr... | 4d scattering amplitudes and asymptotic symmetries from 2d cft |
we consider the shift of charge-to-mass ratio for extremal black holes in the context of effective field theory, motivated by the weak gravity conjecture. we constrain extremality corrections in different regimes subject to unitarity and causality constraints. in the asymptotic ir, we demonstrate that for any supersymm... | causality, unitarity, and the weak gravity conjecture |
this paper addresses a long standing problem, the counting of the microstates of supersymmetric asymptotically ads black holes in terms of a holographically dual field theory. we focus on a class of asymptotically ads4 static black holes preserving two real supercharges which are dual to a topologically twisted deforma... | black hole microstates in ads4 from supersymmetric localization |
we investigate the thermodynamic behaviour of the four dimension gauss bonnet black hole, proposed in [phys. rev. lett. 124, 081301 (2020)], in the ads background . we study the thermodynamics in extended phase space, where the cosmological constant is taken as the thermodynamic pressure. the black hole exhibits a phas... | thermodynamics, phase transition and joule thomson expansion of novel 4-d gauss bonnet ads black hole |
we examine holographic complexity in time-dependent vaidya spacetimes with both the complexity=volume (cv) and complexity=action (ca) proposals. we focus on the evolution of the holographic complexity for a thin shell of null fluid, which collapses into empty ads space and forms a (one-sided) black hole. in order to ap... | holographic complexity in vaidya spacetimes. part i |
a set of infinitesimal virasoro l ⊗ virasoro r diffeomorphisms are presented which act non-trivially on the horizon of a generic kerr black hole with spin j. the covariant phase space formalism provides a formula for the virasoro charges as surface integrals on the horizon. integrability and associativity of the charge... | black hole entropy and soft hair |
we consider gedanken experiments to destroy an extremal or nearly extremal kerr-newman black hole by causing it to absorb matter with sufficient charge and/or angular momentum as compared with energy that it cannot remain a black hole. it was previously shown by one of us that such gedanken experiments cannot succeed f... | gedanken experiments to destroy a black hole. ii. kerr-newman black holes cannot be overcharged or overspun |
in holographic duality, a higher dimensional quantum gravity system emerges from a lower dimensional conformal field theory (cft) with a large number of degrees of freedom. we propose a formulation of duality for a general causally complete bulk spacetime region, called subalgebra-subregion duality, which provides a fr... | subalgebra-subregion duality: emergence of space and time in holography |
black-hole solutions to general relativity carry a thermodynamic entropy, discovered by bekenstein and hawking to be proportional to the area of the event horizon, at leading order in the semiclassical expansion. in a theory of quantum gravity, black holes must constitute ensembles of quantum microstates whose large nu... | black holes in 4d n =4 super-yang-mills field theory |
in the ads/cft correspondence, amplitudes associated to connected bulk manifolds with disconnected boundaries have presented a longstanding mystery. a possible interpretation is that they reflect the effects of averaging over an ensemble of boundary theories. but in examples in dimension d ≥ 3, an appropriate ensemble ... | no ensemble averaging below the black hole threshold |
in 1933-1934 born and infeld constructed the first non-linear generalization of maxwell's electrodynamics that turned out to be a remarkable theory in many respects. in 1935 heisenberg and euler computed a complete effective action describing non-linear corrections to maxwell's theory due to quantum electron-positron o... | introductory notes on non-linear electrodynamics and its applications |
we study analytic properties of the dispersion relations in classical hydrody- namics by treating them as puiseux series in complex momentum. the radii of convergence of the series are determined by the critical points of the associated complex spectral curves. for theories that admit a dual gravitational description t... | the complex life of hydrodynamic modes |
in this paper, we derive the consistent thermodynamics of the four-dimensional lorentzian reissner-nordström-nut (rn-nut), kerr-newman-nut (kn-nut), and rn-nut-ads spacetimes in the framework of the (ψ -n )-pair formalism, and then investigate their topological numbers by using the uniformly modified form of the genera... | consistent thermodynamics and topological classes for the four-dimensional lorentzian charged taub-nut spacetimes |
we examine the circuit complexity of coherent states in a free scalar field theory, applying nielsen's geometric approach as in [1]. the complexity of the coherent states have the same uv divergences as the vacuum state complexity and so we consider the finite increase of the complexity of these states over the vacuum ... | circuit complexity for coherent states |
in this paper the deflection angle of light by a rotating teo wormhole spacetime is calculated in the weak limit approximation. we mainly focus on the weak deflection angle by revealing the gravitational lensing as a partially global topological effect. we apply the gauss-bonnet theorem (gbt) to the optical geometry os... | gravitational lensing by rotating wormholes |
building upon recent progress in applying on-shell amplitude techniques to classical observables in general relativity, we propose a closed-form formula for the conservative hamiltonian of a spinning binary system at the 1st post-minkowskian (1pm) order. it is applicable for general compact spinning bodies with arbitra... | complete hamiltonian for spinning binary systems at first post-minkowskian order |
we report evidence for nonlinear modes in the ringdown stage of the gravitational waveform produced by the merger of two comparable-mass black holes. we consider both the coalescence of black hole binaries in quasicircular orbits and high-energy, head-on black hole collisions. the presence of nonlinear modes in the num... | nonlinear effects in black hole ringdown |
several recent papers have shown a close relationship between entanglement wedge reconstruction and the unitarity of black hole evaporation in ads/cft. the analysis of these papers however has a rather puzzling feature: all calculations are done using bulk dynamics which are essentially those hawking used to predict in... | simple holographic models of black hole evaporation |
we consider the entanglement entropy in 2d conformal field theory in a class of excited states produced by the insertion of a heavy local operator. these include both high-energy eigenstates of the hamiltonian and time-dependent local quenches. we compute the universal contribution from the stress tensor to the single ... | holographic entanglement entropy from 2d cft: heavy states and local quenches |
we generalize the worldline eft formalism developed in [4-9] to calculate the non-conservative tidal effects on spinning black holes in a long wavelength approximation that is valid to all orders in the magnitude of the spin. we present results for the rate of change of mass and angular momentum in a background field a... | non-conservative effects on spinning black holes from world-line effective field theory |
starting from the leading soft term of the 5-point amplitude, involving a graviton and two kerr black holes, that factorises into the product of the elastic amplitude without the graviton and the leading soft factor, we compute the infrared divergent contribution to the imaginary part of the two-loop eikonal. then, usi... | radiation reaction for spinning black-hole scattering |
we present a closed formula for all bern-carrasco-johansson (bcj) numerators describing d -dimensional tree-level scattering amplitudes in a heavy-mass effective field theory with two massive particles and an arbitrary number of gluons. the corresponding gravitational amplitudes obtained via the double copy directly en... | kinematic hopf algebra for bern-carrasco-johansson numerators in heavy-mass effective field theory and yang-mills theory |
we study reflected entropy as a mixed state correlation measure in black hole evaporation. as a measure for bipartite mixed states, reflected entropy can be computed between black hole and radiation, radiation and radiation, and even black hole and black hole. we compute reflected entropy curves in three different mode... | reflected entropy for an evaporating black hole |
a search for resonances and quantum black holes is performed using the dijet mass spectra measured in proton-proton collisions at √{s }=8 tev with the cms detector at the lhc. the data set corresponds to an integrated luminosity of 19.7 fb-1 . in a search for narrow resonances that couple to quark-quark, quark-gluon, o... | search for resonances and quantum black holes using dijet mass spectra in proton-proton collisions at √{s }=8 tev |
our experiment prepares two types of nontrivial quantum states on a trapped ion quantum computer: the thermofield double state of the transverse-field ising model at arbitrary temperature and the quantum critical state of the zero-temperature model. we use techniques motivated by the quantum approximate optimization al... | generation of thermofield double states and critical ground states with a quantum computer |
the continued operation of the advanced ligo and advanced virgo gravitational-wave detectors is enabling the first detailed measurements of the mass, spin, and redshift distributions of the merging binary black hole population. our present knowledge of these distributions, however, is based largely on strongly paramete... | a parameter-free tour of the binary black hole population |
in many-body chaotic systems, the size of an operator generically grows in heisenberg evolution, which can be measured by certain out-of-time-ordered four-point functions. however, these only provide a coarse probe of the full underlying operator growth structure. in this article we develop a methodology to derive the ... | quantum epidemiology: operator growth, thermal effects, and syk |
we study solutions in the plebański-demiański family which describe an accelerating, rotating, and dyonically charged black hole in ads4. these are solutions of d =4 einstein-maxwell theory with a negative cosmological constant and hence minimal d =4 gauged supergravity. it is well known that when the acceleration is n... | accelerating black holes and spinning spindles |
motivated by recent developments in black hole thermodynamics, we investigate van der waals phase transitions of charged black holes in massive gravity. we find that massive gravity theories can exhibit strikingly different thermodynamic behavior compared to that of einstein gravity, and that the mass of the graviton c... | van der waals like behavior of topological ads black holes in massive gravity |
we conjecture that the quantum complexity of a holographic state is dual to the action of a certain spacetime region that we call a wheeler-dewitt patch. we illustrate and test the conjecture in the context of neutral, charged, and rotating black holes in ads, as well as black holes perturbed with static shells and wit... | complexity equals action |
we combine amortized neural posterior estimation with importance sampling for fast and accurate gravitational-wave inference. we first generate a rapid proposal for the bayesian posterior using neural networks, and then attach importance weights based on the underlying likelihood and prior. this provides (1) a correcte... | neural importance sampling for rapid and reliable gravitational-wave inference |
motivated by m-theory/superstring inspired models, we investigate certain behaviors of the deflection angle and the shadow geometrical shapes of higher dimensional quintessential black holes associated with two values of the dark energy (de) state parameter, being $\omega =-\frac{1}{3}$ and $\omega =-\frac{2}{3}$ . con... | deflection angle and shadow behaviors of quintessential black holes in arbitrary dimensions |
the out-of-time-order correlator (otoc) is considered as a measure of quantum chaos. we formulate how to calculate the otoc for quantum mechanics with a general hamiltonian. we demonstrate explicit calculations of otocs for a harmonic oscillator, a particle in a one-dimensional box, a circle billiard and stadium billia... | out-of-time-order correlators in quantum mechanics |
we show that there is a classical metric satisfying the einstein equations outside a finite spacetime region where matter collapses into a black hole and then emerges from a white hole. we compute this metric explicitly. we show how quantum theory determines the (long) time for the process to happen. a black hole can t... | quantum-gravity effects outside the horizon spark black to white hole tunneling |
we study the small speed of light expansion of general relativity, utilizing the modern perspective on non-lorentzian geometry. this is an expansion around the ultra-local carroll limit, in which light cones close up. to this end, we first rewrite the einstein--hilbert action in pre-ultra-local variables, which is clos... | carroll expansion of general relativity |
quantum complexity, suitably defined, has been suggested as an important probe of late-time dynamics of black holes, particularly in the context of ads/cft. a notion of quantum complexity can be effectively captured by quantifying the spread of an operator in krylov space as a consequence of time evolution. complexity ... | krylov localization and suppression of complexity |
we study the bending of light in the space-time of black holes in the four-dimensional einstein-gauss-bonnet theory of gravity, recently proposed by glavan and lin in phys. rev. lett., 124 (2020) 081301. using the rindler-ishak method, the effect of gauss-bonnet coupling on the bending angle is studied. we show that a ... | bending of light in novel 4d gauss-bonnet-de sitter black holes by the rindler-ishak method |
this paper revisits the question of reconstructing bulk gauge fields as boundary operators in ads/cft. in the presence of the wormhole dual to the thermofield double state of two cfts, the existence of bulk gauge fields is in some tension with the microscopic tensor factorization of the hilbert space. i explain how thi... | wormholes, emergent gauge fields, and the weak gravity conjecture |
naively, resolving the black hole information paradox requires microscopic details about quantum gravity. recent work suggests that, instead, a unitary page curve can be recovered by adding disorder-averaged replica instantons to the path integral, though their origin is unclear. in this letter, we show how replica ins... | eigenstate thermalization and disorder averaging in gravity |
recently a complexity-action (ca) duality conjecture has been proposed, which relates the quantum complexity of a holographic boundary state to the action of a wheeler-dewitt (wdw) patch in the anti-de sitter (ads) bulk. in this paper we further investigate the duality conjecture for stationary ads black holes and deri... | action growth for ads black holes |
we investigate the behavior of the weak gravity conjecture (wgc) under toroidal compactification and rg flows, finding evidence that wgc bounds for single photons become weaker in the infrared. by contrast, we find that a photon satisfying the wgc will not necessarily satisfy it after toroidal compactification when bla... | sharpening the weak gravity conjecture with dimensional reduction |
the three-point amplitude is the key building block in the on-shell approach to scattering amplitudes. we show that the classical objects computed by massive three-point amplitudes in gauge theory and gravity are newman-penrose scalars in a split-signature spacetime, where three-point amplitudes can be defined for real... | classical solutions and their double copy in split signature |
black holes provide a window into the microscopic structure of spacetime in quantum gravity. recently the quantum information contained in hawking radiation has been calculated, verifying a key aspect of the consistency of black hole evaporation with quantum mechanical unitarity. this calculation relied crucially on re... | snowmass white paper: quantum aspects of black holes and the emergence of spacetime |
as a probe of circuit complexity in holographic field theories, we study sub-system analogues based on the entanglement wedge of the bulk quantities appearing in the "complexity = volume" and "complexity = action" conjectures. we calculate these quantities for one exterior region of an eternal static neutral or charged... | subsystem complexity and holography |
moving mirrors have been known as tractable setups modeling hawking radiation from black holes. in this paper, motivated by recent developments regarding the black hole information problem, we present extensive studies of moving mirrors in conformal field theories by employing both field theoretic as well as holographi... | holographic moving mirrors |
reproducing the integer count of black hole micro-states from the gravitational path integral is an important problem in quantum gravity. in this paper, we show that, by using supersymmetric localization, the gravitational path integral for $\frac{1}8$-bps black holes in $\mathcal{n}=8$ supergravity reproduces the inde... | black hole microstate counting from the gravitational path integral |
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