abstract stringlengths 3 192k | title stringlengths 4 857 |
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the nonlinear character of general relativity leaves its imprint in the coalescence of two black holes, from the inspiral to the final ringdown stage. to quantify the impact of nonlinearities, we work at second order in black hole perturbation theory and we study the excitation of second-order modes relative to the fir... | spin dependence of black hole ringdown nonlinearities |
in this paper, we report on exact charged black hole solutions in symmergent gravity with maxwell field. symmergent gravity induces the gravitational constant g, quadratic curvature coefficient $c_{\mathrm{o}}$ , and the vacuum energy $v_{\mathrm{o}}$ from the flat spacetime matter loops. in the limit in which all fiel... | constraints on charged symmergent black hole from shadow and lensing |
the black hole weak gravity conjecture (wgc) is a set of linear inequalities on the four-derivative corrections to einstein-maxwell theory. remarkably, in four dimensions, these combinations appear in the 2 → 2 photon amplitudes, leading to the hope that the conjecture might be supported using dispersion relations. how... | bounding violations of the weak gravity conjecture |
in this paper, we study topological numbers for five-, six- and seven-dimensional anti-de sitter black holes in the ghost-free massive gravity. we find that when the black holes are charged, they have the same topological number. the topological numbers for the uncharged black holes are 0 or 1, and the specific values ... | topological classes of higher-dimensional black holes in massive gravity |
it may soon be possible for advanced ligo to detect hundreds of binary black hole mergers per year. we show how the accumulation of many such measurements will allow for the detection of gravitational-wave memory: a permanent displacement of spacetime that comes from strong-field, general relativistic effects. we estim... | detecting gravitational-wave memory with ligo: implications of gw150914 |
despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. orbital eccentricity is one of the clearest tracers of binary formation channels. identifying binary eccentricity, however, remains challengin... | search for eccentric black hole coalescences during the third observing run of ligo and virgo |
we present a compact formula for the supersymmetric partition function of 2d n=(2,2), 3d n=2 and 4d n=1 gauge theories on $\sigma_g \times t^n$ with partial topological twist on $\sigma_g$, where $\sigma_g$ is a riemann surface of arbitrary genus and $t^n$ is a torus with n=0,1,2, respectively. in 2d we also include ce... | supersymmetric partition functions on riemann surfaces |
using recent results in four-derivative 5d n =2 minimal gauged supergravity, we evaluate the regularized on-shell action of the euclidean solution in this theory that admits a lorentzian continuation to an ads5 black hole with one electric charge and two angular momenta. we focus on the supersymmetric limit of this sol... | higher derivative corrections and ads5 black holes |
we propose a doubly holographic version of the semiclassical island formula for the entanglement negativity in the framework of the defect ads/bcft correspondence where the anti-de sitter (ads) bulk contains a defect conformal matter theory. in this context, we propose a defect extremal surface (des) formula for comput... | defect extremal surfaces for entanglement negativity |
we discuss a 1+1 dimensional generalization of the sachdev-ye-kitaev model. the model contains n majorana fermions at each lattice site with a nearest-neighbour hopping term. the syk random interaction is restricted to low momentum fermions of definite chirality within each lattice site. this gives rise to an ordinary ... | higher dimensional generalizations of the syk model |
we compute the length of spacelike geodesics anchored at opposite sides of certain double-sided flow geometries in two dimensions. these geometries are asymptotically anti-de sitter but they admit either a de sitter or a black hole event horizon in the interior. while in the geometries with black hole horizons, the geo... | holographic complexity and de sitter space |
we have previously constructed a waveform model, $\mathtt{s}\mathtt{e}\mathtt{o}\mathtt{b}\mathtt{n}\mathtt{r}\mathtt{e}$ , for spinning binary black hole (bbh) moving along eccentric orbit based on effective-one-body (eob) formalism. in the current paper, we update $\mathtt{s}\mathtt{e}\mathtt{o}\mathtt{b}\mathtt{n}\m... | a higher-multipole gravitational waveform model for an eccentric binary black holes based on the effective-one-body-numerical-relativity formalism |
it is broadly believed that quasinormal modes (qnms) cannot tell the black-hole near-horizon geometry, because usually the low-lying modes are determined by the scattering of perturbations around the peak of the effective potential. using the general parametrization of the black-hole spacetimes respecting the generic p... | first few overtones probe the event horizon geometry |
in this paper, we obtain a bulk dual to the low energy sector of the syk model, including syk model with u(1) charge, by kaluza-klein (kk) reduction from three dimensions. we show that kk reduction of the 3d einstein action plus its boundary term gives the jackiw-teitelboim (jt) model in 2d with the appropriate 1d boun... | holographic dual to charged syk from 3d gravity and chern-simons |
we obtain an exact kerr-like black hole solution by solving the corresponding gravitational field equations in einstein-bumblebee gravity model where lorentz symmetry is spontaneously broken once a vector field acquires a vacuum expectation value. results are presented for the purely radial lorentz symmetry breaking. i... | exact kerr-like solution and its shadow in a gravity model with spontaneous lorentz symmetry breaking |
in this work, we obtain uncharged∖charged kiselev-like black holes as a new class of black hole solutions surrounded by perfect fluid in the context of rastall theory. then, we study the specific cases of the uncharged∖charged black holes surrounded by regular matter like dust and radiation, or exotic matter like quint... | black hole solutions surrounded by perfect fluid in rastall theory |
the role played by the mutual information of subsystems on the page curve is explored in this paper. with the total system consisting of the black hole and radiation, together with the inclusion of island, we observe that the vanishing of mutual information between b+ and b- which in turn means the disconnected phase o... | mutual information, islands in black holes and the page curve |
ultralight bosons can affect the dynamics of spinning black holes (bhs) via superradiant instability, which can lead to a time evolution of the supermassive bh shadow. we study prospects for witnessing the superradiance-induced bh shadow evolution, considering ultralight vector and tensor fields. we introduce two obser... | superradiant evolution of the shadow and photon ring of sgr a⋆ |
we employ the "kmoc" formalism of [1] to compute classical momentum deflections of spinning bodies with arbitrary spin orientations up to next-to-leading order (one loop). we do this in electrodynamics and gravity. the final result, valid for generic masses, is true for all spins at tree level and up to second (fourth)... | nlo deflections for spinning particles and kerr black holes |
three-dimensional einstein gravity with a negative cosmological constant admits stationary black holes that are not necessarily spherically symmetric. we propose boundary conditions for the near-horizon region of these black holes that lead to a surprisingly simple near-horizon symmetry algebra consisting of two affine... | soft heisenberg hair on black holes in three dimensions |
a new formalism for thermodynamics of ads black holes called the restricted phase space thermodynamics (rpst) is proposed. the construction is based on top of visser's holographic thermodynamics, but with the ads radius fixed as a constant. thus the rpst is free of the (p, v) variables but inherits the central charge a... | restricted phase space thermodynamics for ads black holes via holography |
the classical scattering of spinning objects is well described by the spinor-helicity formalism for heavy particles. using these variables, we derive spurious-pole-free, all-spin opposite-helicity compton amplitudes (factorizing on physical poles to the minimal, all-spin three-point amplitudes of ref. \cite{arkani-hame... | searching for kerr in the 2pm amplitude |
recently, in various theoretical works, path-breaking progress has been made in recovering the well-known page curve of an evaporating black hole with quantum extremal islands, proposed to solve the long-standing black hole information loss problem related to the unitarity issue. motivated by this concept, in this pape... | circuit complexity from cosmological islands |
we study the holographic complexity of einstein-maxwell-dilaton gravity using the recently proposed "complexity = volume" and "complexity = action" dualities. the model we consider has a ground state that is represented in the bulk via a so-called hyperscaling violating geometry. we calculate the action growth of the w... | holographic complexity of einstein-maxwell-dilaton gravity |
expanding on the recent derivation of tidal actions for scalar particles, we present here the action for a tidally deformed spin-1/2 particle. focusing on operators containing two powers of the weyl tensor, we combine the hilbert series with an on-shell amplitude basis to construct the tidal action. with the tidal acti... | tidal effects for spinning particles |
we explain in detail how to calculate the gravitational mass and angular momentum multipoles of the most general non-extremal four-dimensional black hole with four magnetic and four electric charges. we also calculate these multipoles for generic supersymmetric four-dimensional microstate geometries and multi-center so... | black holes lessons from multipole ratios |
a number of recent works have argued that quantum complexity, a well-known concept in computer science that has re-emerged recently in the context of the physics of black holes, may be used as an efficient probe of novel phenomena such as quantum chaos and even quantum phase transitions. in this article, we provide fur... | spread complexity and topological transitions in the kitaev chain |
in this paper, the new formalism of thermodynamic geometry proposed in hosseini mansoori and mirza (2019) is employed in investigating phase transition points and the critical behavior of a gauss-bonnet-ads black hole in four dimensional spacetime. in this regard, extrinsic and intrinsic curvatures of a certain kind of... | thermodynamic geometry of the novel 4-d gauss-bonnet ads black hole |
a reissner-nordström black hole (bh) is superradiantly unstable against spherical perturbations of a charged scalar field enclosed in a cavity, with a frequency lower than a critical value. we use numerical relativity techniques to follow the development of this unstable system—dubbed a charged bh bomb—into the nonline... | explosion and final state of an unstable reissner-nordström black hole |
recent work has shown how to understand the page curve of an evaporating black hole from replica wormholes. however, more detailed information about the structure of its quantum state is needed to fully understand the dynamics of black hole evaporation. here we study entanglement negativity, an important measure of qua... | replica wormholes and holographic entanglement negativity |
the properties of compact binaries, such as masses and spins, are imprinted in the gravitational waves (gws) they emit and can be measured using parametrized waveform models. accurately and efficiently describing the complicated precessional dynamics of the various angular momenta of the system in these waveform models... | phenomenological model for the gravitational-wave signal from precessing binary black holes with two-spin effects |
black hole (bh) shadows can be used to probe new physics in the form of ultralight particles via the phenomenon of superradiant instability. by directly affecting the bh mass and spin, superradiance can lead to a time evolution of the bh shadow, which nonetheless has been argued to be unobservable through very-long-bas... | superradiance evolution of black hole shadows revisited |
we construct supersymmetric [inline-graphic not available: see fulltext]solutions of d = 6 gauged supergravity, where [inline-graphic not available: see fulltext] is a two-dimensional orbifold known as a spindle. these uplift to solutions of massive type iia supergravity using a general prescription, that we describe. ... | d4-branes wrapped on a spindle |
we propose a novel method to test the binary black hole nature of compact binaries detectable by gravitational wave (gw) interferometers and, hence, constrain the parameter space of other exotic compact objects. the spirit of the test lies in the "no-hair" conjecture for black holes where all properties of a kerr black... | testing the binary black hole nature of a compact binary coalescence |
on 14 september 2015, a gravitational wave signal from a coalescing black hole binary system was observed by the advanced ligo detectors. this paper describes the transient noise backgrounds used to determine the significance of the event (designated gw150914) and presents the results of investigations into potential c... | characterization of transient noise in advanced ligo relevant to gravitational wave signal gw150914 |
the field equations for scalar-tensor-vector gravity (stvg) or modified gravity (mog) have a static, spherically symmetric black hole solution determined by the mass with two horizons. the strength of the gravitational constant is where is a parameter. a regular singularity-free mog solution is derived using a nonlinea... | black holes in modified gravity (mog) |
we consider light propagation in a nonmagnetized pressureless plasma around a kerr black hole. we find the necessary and sufficient condition the plasma electron density has to satisfy to guarantee that the hamilton-jacobi equation for the light rays is separable, i.e., that a generalized carter constant exists. for al... | light propagation in a plasma on kerr spacetime: separation of the hamilton-jacobi equation and calculation of the shadow |
we propose a new example of entanglement knitting spacetime together, satisfying a series of checks of the corresponding von neumann and renyi entropies. the conjectured dual of de sitter in d + 1 dimensions involves two coupled cft sectors constrained by residual d-dimensional gravity. in the d = 2 case, the gravitati... | de sitter holography and entanglement entropy |
using "complexity=action" proposal we study the growth rate of holographic complexity for lifshitz and hyperscaling violating geometries. we will consider both one and two sided black branes in an einstein-maxwell-dilaton gravitational theory. we find that in either case lloyd's bound is violated and the rate of growth... | complexity growth with lifshitz scaling and hyperscaling violation |
we develop massive higher-spin theory as a framework for describing dynamics of rotating compact objects, such as kerr black holes. in this paper, we explore gauge interactions up to quartic order and corresponding compton amplitudes of higher-spin massive objects coupled to electromagnetism and yang-mills theory. thei... | from higher-spin gauge interactions to compton amplitudes for root-kerr |
we propose an algebraic definition of er=epr in the $g_n \to 0$ limit, which associates bulk spacetime connectivity/disconnectivity to the operator algebraic structure of a quantum gravity system. the new formulation not only includes information on the amount of entanglement, but also more importantly the structure of... | algebraic er=epr and complexity transfer |
double holography offers a profound understanding of the island formula by describing a gravitational system on adsd coupled to a conformal field theory on &r;1,d−1, dual to an adsd+1 spacetime with an end-of-the-world (eow) brane. in this work, we extend the proposal in [12] by considering that the dual bulk spacetime... | island formula in planck brane |
we investigate how the complexity=anything observables proposed by [1, 2] can be used to investigate the interior geometry of ads black holes. in particular, we illustrate how the flexibility of the complexity=anything approach allows us to systematically probe the geometric properties of black hole singularities. we c... | complexity=anything: singularity probes |
we study the canonical ads /cft correspondence between 4d s u (n ) n =4 super yang-mills theory (sym) and type iib superstring theory on ads5×s5. we analyze the supersymmetric index of the n =4 sym on s1×m3 which counts supersymmetric states with fixed quantum numbers. we compute an asymptotic behavior of the index in ... | quantum black hole entropy from 4d supersymmetric cardy formula |
it is widely believed that exact global symmetries do not exist in theories that admit quantum black holes. here we propose a way to quantify the degree of global symmetry violation in the hawking radiation of a black hole by using certain relative entropies. while the violations of global symmetry that we consider are... | signatures of global symmetry violation in relative entropies and replica wormholes |
we investigate the null geodesics and the shadow cast by the kerr-newman-kiselev-letelier (knkl) black hole for the equation of state parameter ωq=-2 /3 and for different values of the spacetime parameters, including the quintessence parameter γ , the cloud of string (cs) parameter b, the spin parameter a and the charg... | shadow and quasinormal modes of the kerr-newman-kiselev-letelier black hole |
we investigate the fine-grained entropy of the de sitter cosmological horizon. starting from three-dimensional pure de sitter space, we consider a partial reduction approach, which supplies an auxiliary system acting as a heat bath both at i + and inside the static patch. this allows us to study the time-dependent entr... | no page curves for the de sitter horizon |
during the past decades, theorists have been studying quantum mechanical systems that are believed to describe black holes. we review one of the simplest examples. it involves a collection of interacting oscillators and majorana fermions. it is conjectured to describe a black hole in an emergent universe governed by ei... | a simple quantum system that describes a black hole |
a manifestation of the black hole information loss problem is that the two-point function of probe operators in a large anti-de sitter black hole decays in time, whereas, on the boundary cft, it is expected to be an almost periodic function of time. we point out that the decay of the two-point function (clustering in t... | information loss, mixing and emergent type iii1 factors |
we study gravitational absorption effects using effective on-shell scattering amplitudes. we develop an in-in probability-based framework involving plane- and partial-wave coherent states for the incoming wave to describe the interaction of the wave with a black hole or another compact object. we connect this framework... | gravitational partial-wave absorption from scattering amplitudes |
according to bekenstein's area law, the black hole entropy is identified holographically with one quarter of the horizon area. however, it is commonly believed that such a law is only valid in einstein's theory and that higher curvature corrections generically give rise to its modifications. this is, for example, the c... | can bekenstein's area law prevail in modified theories of gravity? |
previously the linearized stress tensor of a stationary kerr black hole has been used to determine some of the values of gravitational couplings for a spinning black hole to linear order in the riemann tensor in the action (worldline or quantum field theory). in particular, the couplings on operators containing derivat... | dynamical implications of the kerr multipole moments for spinning black holes |
it has long been known that the coarse-grained approximation to the black hole density of states can be computed using classical euclidean gravity. in this work we argue for another entry in the dictionary between euclidean gravity and black hole physics, namely that euclidean wormholes describe a coarse-grained approx... | wormholes and black hole microstates in ads/cft |
we construct an infinite family of smooth asymptotically-flat supergravity solutions that have the same charges and angular momenta as general supersymmetric d1-d5-p black holes, but have no horizon. these solutions resemble the corresponding black hole to arbitrary accuracy outside of the horizon: they have asymptotic... | asymptotically-flat supergravity solutions deep inside the black-hole regime |
i provide a frequency domain reduced order model (rom) for the aligned-spin effective-one-body model "seobnrv2" for data analysis with second- and third-generation ground-based gravitational wave (gw) detectors. seobnrv2 models the dominant mode of the gws emitted by the coalescence of black hole binaries. the large ph... | frequency domain reduced order model of aligned-spin effective-one-body waveforms with generic mass ratios and spins |
in this paper, we investigate the effect of supersymmetry on the symmetry classification of random matrix theory ensembles. we mainly consider the random matrix behaviors in the n=1 supersymmetric generalization of sachdev-ye-kitaev (syk) model, a toy model for two-dimensional quantum black hole with supersymmetric con... | supersymmetric syk model and random matrix theory |
the volume of the region inside the bulk ryu-takayanagi surface is a codimension-one object, and a natural generalization of holographic complexity to the case of subregions in the boundary qft. we focus on time-independent geometries, and study the properties of this volume in various circumstances. we derive a formul... | on volumes of subregions in holography and complexity |
ultralight bosons can induce superradiant instabilities in spinning black holes, tapping their rotational energy to trigger the growth of a bosonic condensate. possible observational imprints of these boson clouds include (i) direct detection of the nearly monochromatic (resolvable or stochastic) gravitational waves em... | gravitational wave searches for ultralight bosons with ligo and lisa |
the detection of gravitational waves from compact binary mergers by the ligo/virgo collaboration has, for the first time, allowed for tests of relativistic gravity in the strong, dynamical, and nonlinear regime. outside einstein's relativity, spinning black holes may be different from their general relativistic counter... | perturbations of spinning black holes beyond general relativity: modified teukolsky equation |
generic models of regular black holes have separate outer and inner horizons, both with nonzero surface gravity. it has been shown that a nonzero inner horizon surface gravity results in exponential instability at the inner horizon controlled by this parameter. this phenomenon takes the name of "mass inflation instabil... | regular black holes without mass inflation instability |
in this paper, we study joule-thomson effects for charged ads black holes. we obtain inversion temperatures and curves. we investigate similarities and differences between van der waals fluids and charged ads black holes for the expansion. we obtain isenthalpic curves for both systems in the t- p plane and determine th... | joule-thomson expansion of the charged ads black holes |
the detection of gravitational waves from compact binary mergers by ligo has opened the era of gravitational wave astronomy, revealing a previously hidden side of the cosmos. to maximize the reach of the existing ligo observatory facilities, we have designed a new instrument able to detect gravitational waves at distan... | a cryogenic silicon interferometer for gravitational-wave detection |
in this whitepaper, i describe modern applications of effective field theory (eft) techniques to classical and quantum gravity, with relevance to problems in astrophysics and cosmology. as in applications of eft to high-energy, nuclear, or condensed matter physics, the wilsonian paradigm based on decoupling of short di... | effective field theories of gravity and compact binary dynamics: a snowmass 2021 whitepaper |
we construct new euclidean wormhole solutions in adsd+1 and discuss their role in uv-complete theories, without ensemble averaging. the geometries are interpreted as overlaps of ghz-like entangled states, which arise naturally from coarse graining the density matrix of a pure state in the dual cft. in several examples,... | coarse graining pure states in ads/cft |
in this paper, we study massive gravity in the presence of born-infeld nonlinear electrodynamics. first, we obtain metric function related to this gravity and investigate the geometry of the solutions and find that there is an essential singularity at the origin ( r = 0). it will be shown that due to contribution of th... | einstein-born-infeld-massive gravity: ads-black hole solutions and their thermodynamical properties |
we derive a novel four-dimensional black hole with planar horizon that asymptotes to the linear dilaton background. the usual growth of its entanglement entropy before page's time is established. after that, emergent islands modify to a large extent the entropy, which becomes finite and is saturated by its bekenstein-h... | islands in linear dilaton black holes |
if the evaporation of a black hole formed from a pure state is unitary, the entanglement entropy of the hawking radiation should follow the page curve, increasing from zero until near the halfway point of the evaporation, and then decreasing back to zero. the general argument for the page curve is based on the assumpti... | a dynamical mechanism for the page curve from quantum chaos |
we consider string theory on ads3× s3× 𝕋4 in the tensionless limit, with one unit of ns-ns flux. this theory is conjectured to describe the symmetric product orbifold cft. we consider the string on different euclidean backgrounds such as thermal ads3, the btz black hole, conical defects and wormhole geometries. in sim... | partition functions of the tensionless string |
entanglement islands play an essential role in the recent breakthrough in addressing the black hole information paradox. inspired by double holography, it is conjectured that the entanglement islands can exist only in massive gravity. there are many pieces of evidence but also debates for this conjecture. this letter s... | massless entanglement island in wedge holography |
it has been recently proposed by maldacena and qi that an eternal traversable wormhole in a two-dimensional anti-de sitter space is the gravity dual of the low temperature limit of two sachdev-ye-kitaev (syk) models coupled by a relevant interaction (which we will refer to as spin operator). we study spectral and eigen... | quantum chaos transition in a two-site sachdev-ye-kitaev model dual to an eternal traversable wormhole |
qnms govern the linear response to perturbations of bhs, d-branes and fuzzballs and the gravitational wave signals in the ring-down phase of binary mergers. a remarkable connection between qnms of neutral bhs in 4d and quantum sw geometries describing the dynamics of n = 2 sym theories has been recently put forward. we... | qnms of branes, bhs and fuzzballs from quantum sw geometries |
the vacuum entanglement entropy of maxwell theory, when evaluated by standard methods, contains an unexpected term with no known statistical interpretation. we resolve this two-decades old puzzle by showing that this term is the entanglement entropy of edge modes: classical solutions determined by the electric field no... | entanglement entropy of electromagnetic edge modes |
gauge-gravity duality is arguably our best hope for understanding quantum gravity. considerable progress has been made in relating scattering amplitudes in certain gravity theories to those in gauge theories — a correspondence dubbed the double copy. recently, double copies have also been realized in a classical settin... | the newman-penrose map and the classical double copy |
we exploit the recently proposed correspondence between gravitational perturbations and quantum seiberg-witten curves to compute the spectrum of quasi-normal modes of asymptotically flat kerr newman black holes and establish detailed gauge/gravity dictionaries for a large class of black holes, d-branes and fuzzballs in... | more on the sw-qnm correspondence |
we construct the first example of a superstratum: a class of smooth horizonless supergravity solutions that are parameterized by arbitrary continuous functions of (at least) two variables and have the same charges as the supersymmetric d1-d5-p black hole. we work in type iib string theory on t 4 or k3 and our solutions... | habemus superstratum! a constructive proof of the existence of superstrata |
in this chapter we review the state-of-the-art of black holes in asymptotically safe gravity. after a brief recap of the asymptotic safety program, we shall summarize the features of asymptotic-safety-inspired black-hole models that have been constructed in the past by the so-called renormalization group improvement. s... | black holes in asymptotically safe gravity |
we provide an algorithm that shows how to decouple gravitational sources in pure lovelock gravity. this method allows to obtain several new and known analytic solutions of physical interest in scenarios with extra dimensions and with presence of higher curvature terms. furthermore, using our method, it is shown that ap... | a way of decoupling gravitational sources in pure lovelock gravity |
we view and provide further evidence for a number of swampland criteria, including the weak gravity conjecture, distance conjecture and bounds on the finiteness of the quantum gravity vacua from the prism of the finiteness of black hole entropy. furthermore we propose that at least all of these swampland statements may... | finiteness and the swampland |
spin precession is one of the key physical effects that coul unveil the origin of the compact binaries detected by ground- and space-based gravitational-wave (gw) detectors, and shed light on their possible formation channels. efficiently and accurately modeling the gw signals emitted by these systems is crucial to ext... | next generation of accurate and efficient multipolar precessing-spin effective-one-body waveforms for binary black holes |
the phenomenon of spontaneous scalarisation of charged black holes (bhs) has recently motivated studies of various einstein-maxwell-scalar models. within these models, different classes of bh solutions are possible, depending on the non-minimal coupling function f (ϕ), between the scalar field and the maxwell invariant... | einstein-maxwell-scalar black holes: the hot, the cold and the bald |
the distribution of effective spin χeff, a parameter that encodes the degree of spin-orbit alignment in a binary system, has been widely regarded as a robust discriminator between the isolated and dynamical formation pathways for merging binary black holes. until the recent release of the gwtc-2 catalog, such tests hav... | distribution of effective spins and masses of binary black holes from the ligo and virgo o1-o3a observing runs |
we present new results on the equation of state and transition line of hot and dense strongly interacting qcd matter, obtained from a bottom-up einstein-maxwell-dilaton holographic model. we considerably expand the previous coverage in baryon densities in this model by implementing new numerical methods to map the holo... | hot and dense quark-gluon plasma thermodynamics from holographic black holes |
observables related to the real part of the gravitational eikonal, such as the deflection angle and time delay, have been found so far to have a smooth post-minkowskian (pm) expansion whose validity extends from the non-relativistic to the most extreme ultra-relativistic (ur) regime, which smoothly connects with massle... | the eikonal operator at arbitrary velocities i: the soft-radiation limit |
canonical quantization is often used to suggest new effects in quantum gravity, in the dynamics as well as the structure of space-time. usually, possible phenomena are first seen in a modified version of the classical dynamics, for instance in an effective friedmann equation, but there should also be implications for a... | effective line elements and black-hole models in canonical loop quantum gravity |
motivated by recent studies of the information paradox in (1+1)-d anti-de sitter spacetime with a bath described by a (1+1)-d conformal field theory, we study the dynamics of second ŕenyi entropy of the sachdev-ye-kitaev (syk) model (χ) coupled to a majorana chain bath (ψ). the system is prepared in the thermofield dou... | replica wormhole and information retrieval in the syk model coupled to majorana chains |
we study the thermal diffusivity dt in models of metals without quasiparticle excitations ("strange metals"). the many-body quantum chaos and transport properties of such metals can be efficiently described by a holographic representation in a gravitational theory in an emergent curved spacetime with an additional spat... | thermal diffusivity and chaos in metals without quasiparticles |
we present a first-principles cft calculation corresponding to the spherical collapse of a shell of matter in three dimensional quantum gravity. in field theory terms, we describe the equilibration process, from early times to thermalization, of a cft following a sudden injection of energy at time t = 0. by formulating... | black hole collapse in the 1 /c expansion |
one of the major aims of gravitational wave astronomy is to observationally test the kerr nature of black holes. the strongest such test, with minimal additional assumptions, is provided by observations of multiple ringdown modes, also known as black hole spectroscopy. for the gravitational wave merger event gw190521, ... | statistical validation of the detection of a sub-dominant quasi-normal mode in gw190521 |
it has been suggested in recent work that the page curve of hawking radiation can be recovered using computations in semi-classical gravity provided one allows for "islands" in the gravity region of quantum systems coupled to gravity. the explicit computations so far have been restricted to black holes in two-dimension... | entanglement islands in higher dimensions |
we show that complementary state-specific reconstruction of logical (bulk) operators is equivalent to the existence of a quantum minimal surface prescription for physical (boundary) entropies. this significantly generalizes both sides of an equivalence previously shown by harlow[1]; in particular, we do not require the... | quantum minimal surfaces from quantum error correction |
large black holes in anti-de sitter space have positive specific heat and do not evaporate. in order to mimic the behavior of evaporating black holes, one may couple the system to an external bath. in this paper we explore a rich family of such models, namely ones obtained by coupling two holographic cfts along a share... | sailing past the end of the world and discovering the island |
we develop a number of novel "black-bounce" spacetimes. these are specific regular black holes where the area radius always remains nonzero, thereby leading to a "throat" that is either timelike (corresponding to a traversable wormhole), spacelike (corresponding to a "bounce" into a future universe), or null (correspon... | novel black-bounce spacetimes: wormholes, regularity, energy conditions, and causal structure |
we consider the action principles that are the lower dimensional limits of the einstein-gauss-bonnet gravity via the kaluza-klein route. we study the vacua and obtain some exact solutions. we find that the reality condition of the theories may select one vacuum over the other from the two vacua that typically arise in ... | vacua and exact solutions in lower-d limits of egb |
we use the notion of double holography to study hawking radiation emitted by the eternal btz black hole in equilibrium with a thermal bath, but in the form of warped cft2 degrees of freedom. in agreement with the literature, we find entanglement islands and a phase transition in the entanglement surface, but our result... | warped information and entanglement islands in ads/wcft |
we construct perturbative classical solutions of the yang-mills equations coupled to dynamical point particles carrying color charge. by applying a set of color to kinematics replacement rules first introduced by bern, carrasco and johansson, these are shown to generate solutions of d -dimensional dilaton gravity, whic... | radiation and the classical double copy for color charges |
we show that in $\text{o}(d)$ invariant matrix theories containing a large number $d$ of complex or hermitian matrices, one can define a $d\rightarrow\infty$ limit for which the sum over planar diagrams truncates to a tractable, yet non-trivial, sum over melon diagrams. in particular, results obtained recently in syk a... | the large d limit of planar diagrams |
we find hydrodynamic behavior in large simply spinning five-dimensional anti-de sitter black holes. these are dual to spinning quantum fluids through the ads/cft correspondence constructed from string theory. due to the spatial anisotropy introduced by the angular momentum, hydrodynamic transport coefficients are split... | hydrodynamics of simply spinning black holes & hydrodynamics for spinning quantum fluids |
we obtain an asymptotic formula for the average value of the operator product expansion coefficients of any unitary, compact two dimensional cft with c > 1. this formula is valid when one or more of the operators has large dimension or — in the presence of a twist gap — has large spin. our formula is universal in th... | universal dynamics of heavy operators in cft2 |
black hole solutions in general relativity come with pathologies such as singularity and mass inflation instability, which are believed to be cured by a yet-to-be-found quantum theory of gravity. without such consistent description, one may model theory-agnostic phenomenological black holes that bypass the aforesaid is... | regularized stable kerr black hole: cosmic censorships, shadow and quasi-normal modes |
we study some aspects of the de sitter version of jackiw-teitelboim gravity. though we do not have propagating gravitons, we have a boundary mode when we compute observables with a fixed dilaton and metric at the boundary. we compute the no-boundary wavefunctions and probability measures to all orders in perturbation t... | two dimensional nearly de sitter gravity |
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