abstract stringlengths 3 192k | title stringlengths 4 857 |
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preface; 1. introduction; 2. condensed matter: the charted territory; 3. condensed matter: the challenges; 4. large n field theories for holography and condensed matter; 5. the ads/cft correspondence as computational device: the dictionary; 6. finite temperature magic: black holes and holographic thermodynamics; 7. hol... | holographic duality in condensed matter physics |
we study the complexity of gaussian mixed states in a free scalar field theory using the `purification complexity'. the latter is defined as the lowest value of the circuit complexity, optimized over all possible purifications of a given mixed state. we argue that the optimal purifications only contain the essential nu... | complexity of mixed states in qft and holography |
we study scalar fields in a black hole background and show that, when the scalar is suitably coupled to curvature, rapid rotation can induce a tachyonic instability. this instability, which is the hallmark of spontaneous scalarization in the linearized regime, is expected to be quenched by nonlinearities and endow the ... | spin-induced black hole spontaneous scalarization |
we present a counting of microstates of a class of dyonic bps black holes in ads4 which precisely reproduces their bekenstein-hawking entropy. the counting is performed in the dual boundary description, that provides a non-perturbative definition of quantum gravity, in terms of a twisted and mass-deformed abjm theory. ... | exact microstate counting for dyonic black holes in ads4 |
in this paper, via employing the uniformly modified form of the generalized off-shell helmholtz free energy, we investigate the topological numbers for the four-dimensional neutral lorentzian taub-nut, taub-nut-ads and kerr-nut spacetimes, and find that these solutions can also be classified into one of three types of ... | classifying topology of consistent thermodynamics of the four-dimensional neutral lorentzian nut-charged spacetimes |
recently a non-trivial 4-dimensional theory of gravity that claims to circumvent lovelock's theorem and avoid ostrogradsky instability was formulated in glavan and lin (2020) [1]. this theory, named "4d einstein gauss-bonnet gravity", presents several novel predictions for cosmology and black hole physics. in this pape... | charged black holes in ads spaces in 4d einstein gauss-bonnet gravity |
we study the doubly holographic model of [1] in the situation where a black hole in two-dimensional jt gravity theory is coupled to an auxiliary bath system at arbitrary finite temperature. depending on the initial temperature of the black hole relative to the bath temperature, the black hole can lose mass by emitting ... | evaporating black holes coupled to a thermal bath |
we construct black hole solutions with spin-induced scalarization in a class of models where a scalar field is quadratically coupled to the topological gauss-bonnet term. starting from the tachyonically unstable kerr solutions, we obtain families of scalarized black holes such that the scalar field has either even or o... | spin-induced black hole scalarization in einstein-scalar-gauss-bonnet theory |
superradiant instabilities may create clouds of ultralight bosons around rotating black holes, forming so-called "gravitational atoms". it was recently shown that the presence of a binary companion can induce resonant transitions between bound states of these clouds, whose backreaction on the binary's orbit leads to ch... | ionization of gravitational atoms |
we study the link between classical scattering of spinning black holes and quantum amplitudes for massive spin-s particles. generic spin orientations of the black holes are considered, allowing their spins to be deflected on par with their momenta. we rederive the spin-exponentiated structure of the relevant tree-level... | black-hole scattering with general spin directions from minimal-coupling amplitudes |
we find models of two dimensional gravity that resolve the factorization puzzle and have a discrete spectrum, whilst retaining a semiclassical description. a novelty of these models is that they contain non-trivially correlated spacetime branes or, equivalently, nonlocal interactions in their action. such nonlocal corr... | gravity factorized |
under semiclassical evolution, black holes retain a smooth horizon but fail to return information. yet, the ryu-takayanagi (rt) prescription computes the boundary entropy expected from unitary conformal field theory (cft) evolution. we demonstrate this in a novel setting with an asymptotic bulk detector, eliminating an... | unitarity from a smooth horizon? |
the detection of gravitational waves resulting by the ligo-virgo-kagra collaboration has inaugurated a new era in gravitational physics, providing an opportunity to test general relativity and its modifications in the strong gravity regime. one such test involves the study of the ringdown phase of gravitational waves f... | perturbations of spinning black holes in dynamical chern-simons gravity i. slow rotation equations |
volume complexity in ds2 remains o(1) up to a critical time, after which it suddenly diverges. on the other hand, for the ds2 solution in jt gravity, there is a linear dilaton which smoothly grows towards the future infinity. from the dimensional reduction viewpoint, the growth of the dilaton is due to the expansion of... | is action complexity better for de sitter space in jackiw-teitelboim gravity? |
we study correlation functions for extremal supersymmetric black holes. it is necessary to take into account the strongly coupled nature of the boundary supergraviton mode. we consider the case with {\cal n}=2 supercharges which is the minimal amount of supersymmetry needed to give a large ground state degeneracy, sepa... | looking at supersymmetric black holes for a very long time |
we study four-derivative corrections to five-dimensional minimal gauged supergravity. we evaluate the on-shell action of the ads5 black hole solution with two independent angular momenta and one electric charge at linear order in the corrections. after imposing supersymmetry, we are able to recast the action in terms o... | corrections to ads5 black hole thermodynamics from higher-derivative supergravity |
in this note, we explore the possibility that certain high-energy holographic cft states correspond to black hole microstates with a geometrical behind-the-horizon region, modelled by a portion of a second asymptotic region terminating at an end-of-the-world (etw) brane. we study the time-dependent physics of this behi... | black hole microstate cosmology |
we continue the analysis of the krylov complexity in the ip matrix model. in a previous paper, [1], for a fundamental operator, it was shown that at zero temperature, the krylov complexity oscillates and does not grow, but in the infinite temperature limit, the krylov complexity grows exponentially in time as ∼exp(o (√... | krylov complexity in the ip matrix model. part ii |
we analyse the weak gravity conjecture for chiral four-dimensional f-theory compactifications with n = 1 supersymmetry. extending our previous work on nearly tensionless heterotic strings in six dimensions, we show that under certain assumptions a tower of asymptotically massless states arises in the limit of vanishing... | modular fluxes, elliptic genera, and weak gravity conjectures in four dimensions |
extensions of einstein gravity with higher-order derivative terms arise in string theory and other effective theories, as well as being of interest in their own right. in this letter we study static black-hole solutions in the example of einstein gravity with additional quadratic curvature terms. a lichnerowicz-type th... | black holes in higher derivative gravity |
recently, a non-trivial 4d einstein-gauss-bonnet (egb) theory of gravity, by rescaling the gb coupling parameter as α/(d-4), was formulated in [1], which bypasses lovelock's theorem and avoids ostrogradsky instability. the theory admits a static spherically symmetric black hole, unlike 5d egb or general relativity coun... | gravitational lensing by black holes in the 4d einstein-gauss-bonnet gravity |
in this paper, we study rotating black holes in symmergent gravity, and use deviations from the kerr black hole to constrain the parameters of the symmergent gravity. symmergent gravity induces the gravitational constant g and quadratic curvature coefficient co from the flat spacetime matter loops. in the limit in whic... | testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the m87∗ and sgr. a∗ results |
the entropy of a black hole1 and hawking radiation2 should have the same temperature given by the surface gravity, within a numerical factor of the order of unity. in addition, hawking radiation should have a thermal spectrum, which creates an information paradox3,4. however, the thermality should be limited by greybod... | observation of thermal hawking radiation and its temperature in an analogue black hole |
we systematically study the field equations of f (q ) gravity for spherically symmetric and stationary metric-affine spacetimes. such spacetimes are described by a metric as well as a flat and torsionless affine connection. in the symmetric teleparallel equivalent of general relativity (stegr), the connection is pure g... | black holes in f (q ) gravity |
entanglement islands play an essential role in the recent breakthrough in resolving the black hole information paradox. however, whether entanglement islands can exist in massless gravity theories is controversial. it is found that entanglement islands disappear in the initial model of wedge holography with massless gr... | entanglement island and page curve in wedge holography |
we consider the capacity of entanglement as a probe of the hawking radiation in a two-dimensional dilaton gravity coupled with conformal matter of large degrees of freedom. a formula calculating the capacity is derived using the gravitational path integral, from which we speculate that the capacity has a discontinuity ... | replica wormholes and capacity of entanglement |
we study the page curve and the island rule for black holes evaporating into gravitating baths, with an eye towards establishing a connection with the er=epr proposal. we consider several models of two entangled 2d black holes in jackiw-teitelboim (jt) gravity with negative cosmological constant. the first, "doubled ps... | islands with gravitating baths: towards er = epr |
we investigate the shadows and photon spheres of the four-dimensional gauss-bonnet black hole with the static and infalling spherical accretions. we show that, for both cases, there always exist shadows and photon spheres. the radii of the shadows and photon spheres are independent of the profiles of accretion for a fi... | shadows and photon spheres with spherical accretions in the four-dimensional gauss-bonnet black hole |
we comprehensively study galilean and carrollian hydrodynamics on arbitrary backgrounds, in the presence of a matter/charge conserved current. for this purpose, we follow two distinct and complementary paths. the first is based on local invariance, be it galilean or carrollian diffeomorphism invariance, possibly accomp... | relativistic fluids, hydrodynamic frames and their galilean versus carrollian avatars |
we construct a family of multidyonically charged and rotating supersymmetric ads2×σ solutions of d =4 , n =4 gauged supergravity, where σ is a sphere with two conical singularities known as a spindle. we argue that these arise as near horizon limits of extremal dyonically charged rotating and accelerating supersymmetri... | multicharge accelerating black holes and spinning spindles |
we represent the first investigation of pole-skipping on both the gravity and field theory sides. in contrast to the higher dimensional models, there is no momentum degree of freedom in (1 + 1)−dimensional bulk theory. thus, we then consider a scalar field mass as our degree of freedom for the pole-skipping phenomenon ... | pole-skipping points in 2d gravity and syk model |
many-body chaos has emerged as a powerful framework for understanding thermalization in strongly interacting quantum systems. while recent analytic advances have sharpened our intuition for many-body chaos in certain large n theories, it has proven challenging to develop precise numerical tools capable of exploring thi... | many-body chaos in the sachdev-ye-kitaev model |
a key issue in both the field of quantum chaos and quantum gravity is an effective description of chaotic conformal field theories (cfts), that is cfts that have a quantum ergodic limit. we develop a framework incorporating the constraints of conformal symmetry and locality, allowing the definition of ensembles of `cft... | approximate cfts and random tensor models |
a class of tensor models were recently outlined as potentially calculable examples of holography: their perturbative large- n behavior is similar to the sachdev-ye-kitaev (syk) model, but they are fully quantum mechanical (in the sense that there is no quenched disorder averaging). these facts make them intriguing tent... | quantum chaos and holographic tensor models |
recent works have revealed that quantum extremal islands can contribute to the fine-grained entropy of black hole radiation reproducing the unitary page curve. in this paper, we use these results to assess if an observer in de sitter space can decode information hidden behind their cosmological horizon. by computing th... | the price of curiosity: information recovery in de sitter space |
numerical relativity is an essential tool in studying the coalescence of binary black holes (bbhs). it is still computationally prohibitive to cover the bbh parameter space exhaustively, making phenomenological fitting formulas for bbh waveforms and final-state properties important for practical applications. we descri... | hierarchical data-driven approach to fitting numerical relativity data for nonprecessing binary black holes with an application to final spin and radiated energy |
we revisit the complexity = action proposal for charged black holes. we investigate the complexity for a dyonic black hole, and we find the surprising feature that the late-time growth is sensitive to the ratio between electric and magnetic charges. in particular, the late-time growth rate vanishes when the black hole ... | holographic complexity equals which action? |
within general relativity, the unique stationary solution of an isolated black hole is the kerr spacetime, which has a peculiar multipolar structure depending only on its mass and spin. we develop a general method to extract the multipole moments of arbitrary stationary spacetimes and apply it to a large family of hori... | distinguishing fuzzballs from black holes through their multipolar structure |
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) in the classical limit f... | searching for kerr in the 2pm amplitude |
the ligo/virgo detections of binary black hole mergers marked a watershed moment in astronomy, ushering in the era of precision tests of kerr dynamics. we review theoretical and experimental challenges that must be overcome to carry out black hole spectroscopy with present and future gravitational wave detectors. among... | extreme gravity tests with gravitational waves from compact binary coalescences: (ii) ringdown |
it was shown by tsallis and cirto that thermodynamical entropy of a gravitational system such as black hole must be generalized to the non-additive entropy, which is given by sh = γaβ, where a is the horizon area and β is the nonextensive parameter [1]. in this paper, by taking the entropy associated with the apparent ... | modified friedmann equations from tsallis entropy |
we study the thermodynamics of ads4 black hole solutions of einstein-maxwell theory that are accelerating, rotating, and carry electric and magnetic charges. we focus on the class for which the black hole horizon is a spindle and can be uplifted on regular sasaki-einstein spaces to give solutions of d =11 supergravity ... | thermodynamics of accelerating and supersymmetric ads4 black holes |
ultrathin black phosphorus is a two-dimensional semiconductor with a sizeable band gap. its excellent electronic properties make it attractive for applications in transistor, logic and optoelectronic devices. however, it is also the first widely investigated two-dimensional material to undergo degradation upon exposure... | transport properties of pristine few-layer black phosphorus by van der waals passivation in an inert atmosphere |
we construct the first family of horizonless supergravity solutions that have the same mass, charges, and angular momenta as general supersymmetric rotating d 1 -d 5 -p black holes in five dimensions. this family includes solutions with arbitrarily small angular momenta, deep within the regime of quantum numbers and co... | smooth horizonless geometries deep inside the black-hole regime |
we construct a family of non-supersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. the black holes can have finite angular momentum and an arbitrary charge-to-mass ratio, unlike their supersymmetric cousins. these features make them and their microstate geometries astrophys... | gravitational footprints of black holes and their microstate geometries |
we establish a precise relation between the modular bootstrap, used to con- strain the spectrum of 2d cfts, and the sphere packing problem in euclidean geometry. the modular bootstrap bound for chiral algebra u(1)c maps exactly to the cohn-elkies linear programming bound on the sphere packing density in d = 2c dimensio... | sphere packing and quantum gravity |
these lecture notes are intended for starting phd students in theoretical physics who have a working knowledge of general relativity. the 4 topics covered are (1) surface charges as conserved quantities in theories of gravity; (2) classical and holographic features of three-dimensional einstein gravity; (3) asymptotica... | advanced lectures on general relativity |
in three-dimensional de sitter space classical black holes do not exist, and the schwarzschild-de sitter solution instead describes a conical defect with a single cosmological horizon. we argue that the quantum backreaction of conformal fields can generate a black hole horizon, leading to a three-dimensional quantum de... | black holes in ds3 |
we prove that non-extremal black holes in four-dimensional general relativity exhibit an infinite-dimensional symmetry in their near horizon region. by prescribing a physically sensible set of boundary conditions at the horizon, we derive the algebra of asymptotic killing vectors, which is shown to be infinite-dimensio... | extended symmetries at the black hole horizon |
we study weakly coupled u(1) theories in ads3, their associated charged btz solutions, and their charged spectra. we find that modular invariance of the holographic dual two-dimensional cft and compactness of the gauge group together imply the existence of charged operators with conformal dimension significantly below ... | the weak gravity conjecture in three dimensions |
we study the boundary description of the volume of maximal cauchy slices using the recently derived equivalence between bulk and boundary symplectic forms. the volume of constant mean curvature slices is known to be canonically conjugate to "york time". we use this to construct the boundary deformation that is conjugat... | complexity and the bulk volume, a new york time story |
we explore the construction and stability of asymptotically anti-de sitter euclidean wormholes in a variety of models. in simple ad hoc low-energy models, it is not hard to construct two-boundary euclidean wormholes that dominate over disconnected solutions and which are stable (lacking negative modes) in the usual sen... | ads euclidean wormholes |
we present what we believe is the first example of a "λ -line" phase transition in black hole thermodynamics. this is a line of (continuous) second order phase transitions which in the case of liquid 4he marks the onset of superfluidity. the phase transition occurs for a class of asymptotically anti-de sitter hairy bla... | superfluid black holes |
we show that an extremely generic class of two-dimensional conformal field theories (cfts) contains a sector described by the schwarzian theory. this applies to theories with no additional symmetries and large central charge, but does not require a holographic dual. specifically, we use bootstrap methods to show that i... | a universal schwarzian sector in two-dimensional conformal field theories |
we obtain an exact vacuum solution from the gravity sector contained in the minimal standard-model extension. the theoretical model assumes a riemann spacetime coupled to the bumblebee field which is responsible for the spontaneous lorentz symmetry breaking. the solution achieved in a static and spherically symmetric s... | exact schwarzschild-like solution in a bumblebee gravity model |
we study the logarithmic corrections to various cft partition functions in the context of the ads$_4$/cft$_3$ correspondence for theories arising on the worldvolume of m2-branes. we utilize four-dimensional gauged supergravity and heat kernel methods and present general expressions for the logarithmic corrections to th... | a compendium of logarithmic corrections in ads/cft |
in this work we complete the spin-dependent conservative dynamics of inspiralling compact binaries at the fourth post-newtonian order, and in particular the derivation of the next-to-next-to-leading order spin-squared interaction potential. we derive the physical equations of motion of the position and the spin from a ... | complete conservative dynamics for inspiralling compact binaries with spins at the fourth post-newtonian order |
we investigate the entanglement between the eternal black hole and hawking radiation. for this purpose, we utilize the doubly holographic theories and study the entanglement entropy of the radiation to find the page curve consistent with the unitarity principle. doubly holographic theories introduce two types of bounda... | entanglement entropy analysis of dyonic black holes using doubly holographic theory |
certain holographic states of matter with a global u(1) symmetry support a sound mode at zero temperature, caused neither by spontaneous symmetry breaking of the global u(1) nor by the emergence of a fermi surface in the infrared. in this work, we show that such a mode is also found in zero density holographic quantum ... | zero sound and higher-form symmetries in compressible holographic phases |
we study the extended thermodynamics, obtained by considering the cosmological constant as a thermodynamic variable, of stu black holes in 4-dimensions in the fixed charge ensemble. the associated phase structure is conjectured to be dual to an rg-flow on the space of field theories. we find that for some charge config... | holographic entanglement entropy and the extended phase structure of stu black holes |
the topological classification of critical points of black holes in 4d einstein-gauss-bonnet gravity coupled to born-infeld theory is investigated. considered independently, born-infeld corrections to the einstein action alter the topological charge of critical points of the charged ads black hole system, whereas the g... | topology of born-infeld ads black holes in 4d novel einstein-gauss-bonnet gravity |
the entanglement properties of random pure states are relevant to a variety of problems ranging from chaotic quantum dynamics to black-hole physics. the averaged bipartite entanglement entropy of such states admits a volume law and upon increasing the subregion size follows the page curve. in this paper, we generalize ... | entanglement negativity spectrum of random mixed states: a diagrammatic approach |
many three-dimensional n=2 scfts admit a universal partial topological twist when placed on hyperbolic riemann surfaces. we exploit this fact to derive a universal formula which relates the planar limit of the topologically twisted index of these scfts and their three-sphere partition function. we then utilize this to ... | a universal counting of black hole microstates in ads4 |
by following closely weinberg's soft theorem, which captures the 1/ω pole contribution to the amplitude for soft graviton emissions (ω < λ) on top of an arbitrary background hard process, we calculate the expectation value of the graviton's angular momentum operator for arbitrary collisions dressed with soft radiati... | angular momentum of zero-frequency gravitons |
we classify and study defects in 2d jackiw-teitelboim gravity. we show these are holographically described by a deformation of the schwarzian theory where the reparametrization mode is integrated over different coadjoint orbits of the virasoro group. we show that the quantization of each coadjoint orbit is connected to... | defects in jackiw-teitelboim quantum gravity |
we study the gravitational description of extremal supersymmetric black holes. we point out that the ads_2ads2 near horizon geometry can be used to compute interesting observables, such as correlation functions of operators. in this limit, the hamiltonian is zero and correlation functions are time independent. we discu... | holography for people with no time |
in this work, we propose a testing procedure to distinguish between the different approaches for computing complexity. our test does not require a direct comparison between the approaches and thus avoids the issue of choice of gates, basis, etc. the proposed testing procedure employs the information-theoretic measures ... | time evolution of complexity: a critique of three methods |
we re-examine the black hole solutions in classical theories of dilaton gravity in two dimensions. we consider an arbitrary dilaton potential such that there are black hole solutions asymptotic at infinity to the nearly $\mathrm{ads}_2$ solutions of jt gravity, and such that the black hole energy and entropy are bounde... | deformations of jt gravity and phase transitions |
we explore the celestial holography proposal for non-trivial asymptotically flat backgrounds including the coulomb field of a static and spinning point charge, their gravitational counterparts described by the schwarzschild and kerr metrics, as well as the aichelburg-sexl shockwave and spinning shockwave geometries and... | celestial holography on kerr-schild backgrounds |
given a solution to 4d einstein gravity with an isometry direction, it is known that the equations of motion are identical to those of a 3d σ model with target space geometry s u (1 ,1 )/u (1 ). thus, any transformation by s u (1 ,1 )≅s l (2 ,r ) is a symmetry for the action and allows one to generate new solutions in ... | ehlers transformations as em duality in the double copy |
we compute the four-momentum radiated during the scattering of two spinless bodies, at leading order in the newton's contant g and at all orders in the velocities, using the effective field theory worldline approach. following [1], we derive the conserved stress-energy tensor linearly coupled to gravity generated by lo... | radiated momentum in the post-minkowskian worldline approach via reverse unitarity |
dijet events are studied in the proton--proton collision dataset recorded at $\sqrt{s}=$13 tev with the atlas detector at the large hadron collider in 2015 and 2016, corresponding to integrated luminosities of 3.5 fb$^{-1}$ and 33.5 fb$^{-1}$ respectively. invariant mass and angular distributions are compared to backgr... | search for new phenomena in dijet events using 37 fb$^{-1}$ of $pp$ collision data collected at $\\sqrt{s}=$13 tev with the atlas detector |
we study the holographic dual of the extended thermodynamics of spherically symmetric, charged ads black holes in the context of the ads/cft correspondence. the gravitational thermodynamics of ads black holes can be extended by allowing for variations of the cosmological constant and newton's constant. in the dual cft ... | holographic cft phase transitions and criticality for charged ads black holes |
we study the index of 4d n =4 yang-mills theory with u (n ) gauge group, focusing on the physics of the dual bogomolny-prasad-sommerfield black holes in ads5×s5. certain aspects of these black holes can be studied from finite n indices with reasonably large n2. we make numerical studies of the index for n ≤6 , by expan... | ads black holes and finite n indices |
we introduce a formulation for spinning gravitating objects in the effective field theory in the post-newtonian scheme in the context of the binary inspiral problem. we aim at an effective action, where all field modes below the orbital scale are integrated out. we spell out the relevant degrees of freedom, in particul... | spinning gravitating objects in the effective field theory in the post-newtonian scheme |
there has been recent progress in understanding chaotic features in many-body quantum systems. motivated by the scrambling of information in black holes, it has been suggested that the time dependence of out-of-time-ordered (oto) correlation functions such as <o2(t ) o1(0 ) o2(t ) o1(0 ) > is a faithful measure o... | measurement of many-body chaos using a quantum clock |
the membrane paradigm displays underlying connections between a timelike stretched horizon and a null boundary (such as a black hole horizon) and bridges the gravitational dynamics of the horizon with fluid dynamics. in this work, we revisit the membrane viewpoint of a finite distance null boundary and present a unifie... | carrollian hydrodynamics and symplectic structure on stretched horizons |
we show that a holographic description of four-dimensional asymptotically locally flat spacetimes is reached smoothly from the zero-cosmological-constant limit of anti-de sitter holography. to this end, we use the derivative expansion of fluid/gravity correspondence. from the boundary perspective, the vanishing of the ... | flat holography and carrollian fluids |
the optical appearance of a body compact enough to feature an unstable bound orbit, when surrounded by an accretion disk, is expected to be dominated by a luminous ring of radiation enclosing a central brightness depression typically known as the shadow. despite observational limitations, the rough details of this pict... | shadows and photon rings of regular black holes and geonic horizonless compact objects |
black hole spectroscopy is the program to measure the complex gravitational wave frequencies of merger remnants, and to quantify their agreement with the characteristic frequencies of black holes computed at linear order in black hole perturbation theory. in a "weaker" (nonagnostic) version of this test, one assumes th... | agnostic black hole spectroscopy: quasinormal mode content of numerical relativity waveforms and limits of validity of linear perturbation theory |
we present the result of the quadratic-in-spin interaction hamiltonian for binary systems of rotating compact objects with generic spins, up to n3lo corrections within the post-newtonian expansion. the calculation is performed by employing the effective field theory diagrammatic approach, and it involves feynman integr... | gravitational quadratic-in-spin hamiltonian at nnnlo in the post-newtonian framework |
in this paper, we use the karch-randall braneworld to study theories of quantum gravity in two dimensional (nearly) anti-de sitter space (ads2). we focus on effective gravitational theories in the setup with two karch-randall branes embedded in an asymptotically ads3 bulk forming a wedge. we find the appearance of two-... | aspects of ads2 quantum gravity and the karch-randall braneworld |
we demonstrate that the rotating four-dimensional gauss- bonnet black hole can act as a particle accelerator with arbitrarily high centre-of-mass (cm) energy, when collision of two general particles takes place near the event horizon. the particles are at rest initially at infinity, and by fine tuning their angular mom... | rotating 4d gauss-bonnet black hole as a particle accelerator |
recent work has shown that loop corrections from massless particles generate $\frac{3}{2}\log t_{\text{hawking}}$ corrections to black hole entropy which dominate the thermodynamics of cold near-extreme charged black holes. here we adapt this analysis to near-extreme kerr black holes. like ads$_2\times s^2$, the near-h... | logarithmic corrections to kerr thermodynamics |
we develop an effective framework for the μ ¯ scheme of holonomy corrections motivated by loop quantum gravity for vacuum spherically symmetric space-times. this is done by imposing the areal gauge in the classical theory and then expressing the remaining components of the ashtekar-barbero connection in the hamiltonian... | effective loop quantum gravity framework for vacuum spherically symmetric spacetimes |
the standard black holes (bhs) in general relativity, as well as other ultracompact objects (with or without an event horizon) admit planar circular photon orbits. these light rings (lrs) determine several spacetime properties. for instance, stable lrs trigger instabilities and, in spherical symmetry, (unstable) lrs co... | fundamental photon orbits: black hole shadows and spacetime instabilities |
much of the success of gravitational-wave astronomy rests on perturbation theory. historically, perturbative analysis of gravitational-wave sources has largely focused on post-newtonian theory. however, strong-field perturbation theory is essential in many cases such as the quasinormal ringdown following the merger of ... | black hole perturbation theory and gravitational self-force |
in general relativity, when two black holes merge they produce a rotating (kerr) black hole remnant. according to perturbation theory, the remnant emits "ringdown" radiation: a superposition of exponentials with characteristic complex frequencies that depend only on the remnant's mass and spin. while the goal of the bl... | extracting linear and nonlinear quasinormal modes from black hole merger simulations |
we study general relativity at a null boundary using the covariant phase space formalism. we define a covariant phase space and compute the algebra of symmetries at the null boundary by considering the boundary-preserving diffeomorphisms that preserve this phase space. this algebra is the semi-direct sum of diffeomorph... | symmetries and charges of general relativity at null boundaries |
we show that rotating black holes do not experience any tidal deformation when they are perturbed by a weak and adiabatic gravitational field. the tidal deformability of an object is quantified by the so-called "love numbers," which describe the object's linear response to its external tidal field. in this work, we com... | tidal deformation and dissipation of rotating black holes |
in the last few years, machine learning techniques, in particular convolutional neural networks, have been investigated as a method to replace or complement traditional matched filtering techniques that are used to detect the gravitational-wave signature of merging black holes. however, to date, these methods have not ... | convolutional neural networks: a magic bullet for gravitational-wave detection? |
the kerr nature of a compact-object-coalescence remnant can be unveiled by observing multiple quasinormal modes in the post-merger signal. current methods to achieve this goal rely on matching the data with a superposition of exponentially damped sinusoids with amplitudes fitted to numerical-relativity (nr) simulations... | black-hole spectroscopy by making full use of gravitational-wave modeling |
we carry out in full generality and without fixing specific boundary conditions, the symmetry and charge analysis near a generic null surface for two and three dimensional (2d and 3d) gravity theories. in 2d and 3d there are respectively two and three charges which are generic functions over the codimension one null su... | symmetries at null boundaries: two and three dimensional gravity cases |
we consider a nearly-ads2 gravity theory on the two-sided wormhole geometry. we construct three gauge-invariant operators in nads2 which move bulk matter relative to the dynamical boundaries. in a two-sided system, these operators satisfy an sl(2) algebra (up to non perturbative corrections). in a semiclassical limit, ... | symmetries near the horizon |
we propose in this white paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of lisa and the terrestrial ligo/virgo/kagra/indigo experiments. this interdisciplinary experiment, called at... | aedge: atomic experiment for dark matter and gravity exploration in space |
we discuss a remarkable correspondence between the description of black holes as highly occupied condensates of n weakly interacting gravitons and that of color glass condensates (cgcs) as highly occupied gluon states. in both cases, the dynamics of "wee partons" in regge asymptotics is controlled by emergent semihard ... | classicalization and unitarization of wee partons in qcd and gravity: the cgc-black hole correspondence |
we describe a class of holographic models that may describe the physics of certain four-dimensional big-bang/big-crunch cosmologies. the construction involves a pair of 3d euclidean holographic cfts each on a homogeneous and isotropic space m coupled at either end of an interval ℐ to a euclidean 4d cft on m × ℐ with ma... | cosmology from confinement? |
extended scalar-tensor gauss-bonnet (estgb) gravity has been recently argued to exhibit spontaneous scalarization of vacuum black holes (bhs). a similar phenomenon can be expected in a larger class of models, which includes, e.g., einstein-maxwell scalar (ems) models, where spontaneous scalarization of electrovacuum bh... | spontaneous scalarization of charged black holes |
we present a package for mathematica that facilitates the numerical computation of the quasinormal mode (qnm) spectrum of a black hole/black brane. requiring as input only the qnm equation(s), the application of a single mathematica function will compute the spectrum efficiently, by discretizing the equation(s) and sol... | overdamped modes in schwarzschild-de sitter and a mathematica package for the numerical computation of quasinormal modes |
so-called "regular black holes" are a topic currently of considerable interest in the general relativity and astrophysics communities. herein we investigate a particularly interesting regular black hole spacetime described by the line element this spacetime neatly interpolates between the standard schwarzschild black h... | black-bounce to traversable wormhole |
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