abstract stringlengths 3 192k | title stringlengths 4 857 |
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recent series of theoretical and experimental reports have driven attention to time-reversal symmetry-breaking spintronic and spin-splitting phenomena in materials with collinear-compensated magnetic order incompatible with conventional ferromagnetism or antiferromagnetism. here we employ an approach based on nonrelati... | beyond conventional ferromagnetism and antiferromagnetism: a phase with nonrelativistic spin and crystal rotation symmetry |
weoutline the program to apply modern quantum field theory methods to calculate observables in classical general relativity through a truncation to classical terms of the multigraviton, two-body, on-shell scattering amplitudes between massive fields. since only long-distance interactions corresponding to nonanalytic pi... | general relativity from scattering amplitudes |
gravity in 4 d asymptotically flat spacetime constitutes the archetypal example of a gravitational system with leaky boundary conditions. pursuing our previous analysis of [carrollian perspective on celestial holography, phys. rev. lett. 129, 071602 (2022), 10.1103/physrevlett.129.071602], we argue that the holographic... | bridging carrollian and celestial holography |
we consider quantum algebras of observables associated with subregions in theories of einstein gravity coupled to matter in the gn → 0 limit. when the subregion is spatially compact or encompasses an asymptotic boundary, we argue that the algebra is a type ii von neumann factor. to do so in the former case we introduce... | generalized entropy for general subregions in quantum gravity |
radiation reaction (rr) terms at the third post-minkowskian (3pm) order have recently been found to be instrumental in restoring smooth continuity between the non-relativistic, relativistic, and ultra-relativistic (including the massless) regimes. here we propose a new and intriguing connection between rr and soft (bre... | radiation reaction from soft theorems |
we propose swampland criteria for braneworlds viewed as effective field theories of defects coupled to semiclassical gravity. we do this by exploiting their holographic interpretation. we focus on general features of entanglement entropies and their holographic calculations. entropies have to be positive. furthermore, ... | constraining braneworlds with entanglement entropy |
we study linearized stability in first-order relativistic viscous hydrodynamics in the most general frame. there is a region in the parameter space of transport coefficients where the perturbations of the equilibrium state are stable. this defines a class of stable frames, with the landau-lifshitz frame falling outside... | first-order relativistic hydrodynamics is stable |
asymptotic safety is a theoretical proposal for the ultraviolet completion of quantum field theories, in particular for quantum gravity. significant progress on this program has led to a first characterization of the reuter fixed point. further advancement in our understanding of the nature of quantum spacetime require... | critical reflections on asymptotically safe gravity |
we analyze constraints from perturbative unitarity and crossing on the leading contributions of higher-dimension operators to the four-graviton amplitude in four spacetime dimensions, including constraints that follow from distinct helicity configurations. we focus on the leading-order effect due to exchange by massive... | gravitational effective field theory islands, low-spin dominance, and the four-graviton amplitude |
for various reasons, it seems necessary to include complex saddle points in the "euclidean" path integral of general relativity. but some sort of restriction on the allowed complex saddle points is needed to avoid various unphysical examples. in this article, a speculative proposal is made concerning a possible restric... | a note on complex spacetime metrics |
a technique for translating the classical scattering function of two gravitationally interacting bodies into a corresponding (effective one-body) hamiltonian description has been recently introduced [phys. rev. d 94, 104015 (2016), 10.1103/physrevd.94.104015]. using this technique, we derive, for the first time, to sec... | high-energy gravitational scattering and the general relativistic two-body problem |
the present grasp2018 is an updated fortran 95 version of the recommended block versions of programs from grasp2k version 1_1 for large-scale calculations jönsson et al. (2013). mpi programs are included so that all major tasks can be executed using parallel computers. tools have been added that simplify the generation... | grasp2018-a fortran 95 version of the general relativistic atomic structure package |
we explain how twistor theory represents the self-dual sector of four dimensional gravity in terms of the loop group of poisson diffeomorphisms of the plane via penrose's non-linear graviton construction. the symmetries of the self-dual sector are generated by the corresponding loop algebra lw1+∞ of the algebra w1+∞ of... | celestial w(1+infty) symmetries from twistor space |
in symmetric teleparallel general relativity, gravity is attributed to the non-metricity. the so-called "coincident gauge" is usually taken in this theory so that the affine connection vanishes and the metric is the only fundamental variable. this gauge choice was kept in many studies on the extensions of symmetric tel... | covariant formulation of f(q) theory |
it is shown that the infinite tower of tree-level soft graviton symmetries in asymptotically flat 4d quantum gravity can be organized into a single chiral 2d kac-moody symmetry based on the wedge algebra of w(1+infinity). the infinite towers of soft photon or gluon symmetries also transform irreducibly under w(1+infini... | w(1+infinity) and the celestial sphere |
the design and implementation of a new framework for adaptive mesh refinement calculations are described. it is intended primarily for applications in astrophysical fluid dynamics, but its flexible and modular design enables its use for a wide variety of physics. the framework works with both uniform and nonuniform gri... | the athena++ adaptive mesh refinement framework: design and magnetohydrodynamic solvers |
we prove a conjectured lower bound on < t__( x)> ψin any state ψ of a cft on minkowski space, dubbed the quantum null energy condition (qnec). the bound is given by the second order shape deformation, in the null direction, of the geometric entanglement entropy of an entangling cut passing through x. our proof in... | a general proof of the quantum null energy condition |
recently, a novel four-dimensional gauss-bonnet theory has been suggested as a limiting case of the original d-dimensional theory with singular gauss-bonnet coupling constant α →α /(d -4 ) . the theory is proposed at the level of field equations. here we analyse this theory at the level of action. we find that the on-s... | a note on the total action of 4d gauss-bonnet theory |
we consider the problem of defining localized subsystems in gauge theory and gravity. such systems are associated to spacelike hypersurfaces with boundaries and provide the natural setting for studying entanglement entropy of localized subsystems. we present a general formalism to associate a gauge-invariant classical ... | local subsystems in gauge theory and gravity |
we study two recent conjectures for holographic complexity: the complexity=action conjecture and the complexity=volume conjecture. in particular, we examine the structure of the uv divergences appearing in these quantities, and show that the coefficients can be written as local integrals of geometric quantities in the ... | comments on holographic complexity |
we review the developments in the past decade on holographic entanglement entropy, a subject that has garnered much attention owing to its potential to teach us about the emergence of spacetime in holography. we provide an introduction to the concept of entanglement entropy in quantum field theories, review the hologra... | holographic entanglement entropy |
we investigate the d → 4 limit of the d-dimensional einstein-gauss-bonnet gravity, where the limit is taken with α ∼ = (d - 4) α kept fixed and α is the original gauss-bonnet coupling. using the adm decomposition in d dimensions, we clarify that the limit is rather subtle and ambiguous (if not ill-defined) and depends ... | a consistent theory of d → 4 einstein-gauss-bonnet gravity |
we develop a new setting in the framework of braneworld holography to describe a pair of coupled and entangled uniformly accelerated universes. the model consists of two branes embedded into ads space capping off the uv and ir regions, giving rise to a notion of ds wedge holography. specializing in a three-dimensional ... | entangled universes in ds wedge holography |
we produce gravitational waveforms for nonspinning compact binaries undergoing a quasicircular inspiral. our approach is based on a two-timescale expansion of the einstein equations in second-order self-force theory, which allows first-principles waveform production in tens of milliseconds. although the approach is des... | gravitational waveforms for compact binaries from second-order self-force theory |
we study complex scalar theories with dipole symmetry and uncover a no-go theorem that governs the structure of such theories and which, in particular, reveals that a gaussian theory with linearly realised dipole symmetry must be carrollian. the gauging of the dipole symmetry via the noether procedure gives rise to a s... | fractons, dipole symmetries and curved spacetime |
we introduce a novel bootstrap method for heavy-mass effective field theory classical compton scattering amplitudes involving two massless particles and two arbitrary-spin infinite-mass limit particles. using a suitable ansatz, we deduce new and explicit classical spin results for gluon four and five-point infinite mas... | classical spin gravitational compton scattering |
since the first proof-of-principle experiments over 25 years ago, atom interferometry has matured to a versatile tool that can be used in fundamental research in particle physics, general relativity and cosmology. at the same time, atom interferometers are currently moving out of the laboratory to be used as ultrapreci... | taking atom interferometric quantum sensors from the laboratory to real-world applications |
the double copy is, in essence, a map between scattering amplitudes in a broad variety of familiar field and string theories. in addition to the mathematically rich intrinsic structure, it underlies a multitude of active research directions and has a range of interesting applications in quantum, classical and effective... | snowmass white paper: the double copy and its applications |
the iebe-vishnu code package performs event-by-event simulations for relativistic heavy-ion collisions using a hybrid approach based on (2 + 1)-dimensional viscous hydrodynamics coupled to a hadronic cascade model. we present the detailed model implementation, accompanied by some numerical code tests for the package. i... | the iebe-vishnu code package for relativistic heavy-ion collisions |
we attempt to clarify several aspects concerning the recently presented four-dimensional einstein-gauss-bonnet gravity. we argue that the limiting procedure outlined in [phys. rev. lett. 124, 081301 (2020)] generally involves ill-defined terms in the four dimensional field equations. potential ways to circumvent this i... | inconsistencies in four-dimensional einstein-gauss-bonnet gravity |
gyroscopes are essential to many diverse applications associated with navigation, positioning and inertial sensing1. in general, most optical gyroscopes rely on the sagnac effect—a relativistically induced phase shift that scales linearly with the rotational velocity2,3. in ring laser gyroscopes (rlgs), this shift mani... | non-hermitian ring laser gyroscopes with enhanced sagnac sensitivity |
we provide a unified treatment of conformally soft goldstone modes which arise when spin-one or spin-two conformal primary wavefunctions become pure gauge for certain integer values of the conformal dimension δ. this effort lands us at the crossroads of two ongoing debates about what the appropriate conformal basis for... | asymptotic symmetries and celestial cft |
in this paper we take the first steps towards bridging the gap between the conformal and cosmological bootstrap programs. we present a simple general relation between tree-level exchanges in anti-de sitter (ads) and de sitter (ds) space with bunch-davies intial conditions, providing a complete ads to ds dictionary at t... | from ads to ds exchanges: spectral representation, mellin amplitudes, and crossing |
building upon the worldline effective field theory (eft) formalism for spinning bodies developed for the post-newtonian regime, we generalize the eft approach to post-minkowskian (pm) dynamics to include rotational degrees of freedom in a manifestly covariant framework. we introduce a systematic procedure to compute th... | spin effects in the effective field theory approach to post-minkowskian conservative dynamics |
we study the fluctuation entropy for two-dimensional matter systems with an internal symmetry coupled to jackiw-teitelboim (jt) gravity joined to a minkowski region. the fluctuation entropy is the shannon entropy associated to probabilities of finding particular charge for a region. we first consider a case where the m... | charge fluctuation entropy of hawking radiation: a replica-free way to find large entropy |
we present the two-body hamiltonian and associated eikonal phase, to leading post-minkowskian order, for infinitely many tidal deformations described by operators with arbitrary powers of the curvature tensor. scattering amplitudes in momentum and position space provide systematic complementary approaches. for the tida... | leading nonlinear tidal effects and scattering amplitudes |
we describe in more detail the general relation uncovered in our previous work between boundary correlators in de sitter (ds) and in euclidean anti-de sitter (eads) space, at any order in perturbation theory. assuming the bunch-davies vacuum at early times, any given diagram contributing to a boundary correlator in ds ... | from ds to ads and back |
we study constraints from causality and unitarity on 2 → 2 graviton scattering in four-dimensional weakly-coupled effective field theories. together, causality and unitarity imply dispersion relations that connect low-energy observables to high-energy data. using such dispersion relations, we derive two-sided bounds on... | causality constraints on corrections to einstein gravity |
we study classical radiation fields at next-to-leading order using the methods of scattering amplitudes. the fields of interest to us are sourced when two massive, point-like objects scatter inelastically, and can be computed from one-loop amplitudes. we show that the real and imaginary parts of the amplitudes both pla... | radiation and reaction at one loop |
given the importance of quantum reference frames (qrfs) to both quantum and gravitational physics, it is pertinent to develop a systematic method for switching between the descriptions of physics relative to different choices of qrfs, which is valid in both fields. here we continue with such a unifying approach, begun ... | switching quantum reference frames in the n-body problem and the absence of global relational perspectives |
using the implicit function theorem we demonstrate that solutions to the classical part of the relativistic lippmann-schwinger equation are in one-to-one correspondence with those of the energy equation of a relativistic two-body system. a corollary is that the scattering angle can be computed from the amplitude itself... | post-minkowskian scattering angle in einstein gravity |
this is the first paper in a series devoted to understanding the classical and quantum nature of edge modes and symmetries in gravitational systems. the goal of this analysis is to: i) achieve a clear understanding of how different formulations of gravity provide non-trivial representations of different sectors of the ... | edge modes of gravity. part i. corner potentials and charges |
metamaterials constructed from deep subwavelength building blocks have been used to demonstrate phenomena ranging from negative refractive index and ɛ-near-zero to cloaking, emulations of general relativity, and superresolution imaging. more recently, metamaterials have been suggested as a new platform for quantum opti... | quantum entanglement of the spin and orbital angular momentum of photons using metamaterials |
we argue that if the newtonian gravitational field of a body can mediate entanglement with another body, then it should also be possible for the body producing the newtonian field to entangle directly with on-shell gravitons. our arguments are made by revisiting a gedankenexperiment previously analyzed by belenchia et ... | gravitationally mediated entanglement: newtonian field versus gravitons |
we present the results of an improved monte carlo glauber (mcg) model of relevance for collisions involving nuclei at center-of-mass energies of the bnl relativistic heavy ion collider (√{snn}=0.2 tev), cern large hadron collider (lhc) (√{snn}=2.76 -8.8 tev ), and proposed future hadron colliders (√{snn}≈10 -63 tev). t... | improved monte carlo glauber predictions at present and future nuclear colliders |
fluka is a general purpose monte carlo code able to describe the transport and interaction of any particle and nucleus type in complex geometries over an energy range extending from thermal neutrons to ultrarelativistic hadron collisions. it has many different applications in accelerator design, detector studies, dosim... | new capabilities of the fluka multi-purpose code |
we present a new formula for the angular momentum jμ ν carried away by gravitational radiation in classical scattering. this formula, combined with the known expression for the radiated linear momentum pμ, completes the set of radiated poincaré charges due to scattering. we parametrize pμ and jμ ν by nonperturbative fo... | radiated angular momentum and dissipative effects in classical scattering |
we consider carroll-invariant limits of lorentz-invariant field theories. we show that just as in the case of electromagnetism, there are two inequivalent limits, one "electric" and the other "magnetic". each can be obtained from the corresponding lorentz-invariant theory written in hamiltonian form through the same "c... | carroll contractions of lorentz-invariant theories |
this paper points out the importance of the assumption of locality of physical interactions, and the concomitant necessity of propagation of an entity (in this case, off-shell quanta—virtual gravitons) between two nonrelativistic test masses in unveiling the quantum nature of linearized gravity through a laboratory exp... | locality and entanglement in table-top testing of the quantum nature of linearized gravity |
we identify the unique stress tensor deformation which preserves zero-birefringence conditions in non-linear electrodynamics, which is a 4d4d version of the t\overline{t}tt¯ operator. we study the flows driven by this operator in the three lagrangian theories without birefringence - born-infeld, plebanski, and reverse ... | stress tensor flows, birefringence in non-linear electrodynamics and supersymmetry |
the system created in ultrarelativistic nuclear collisions is known to behave as an almost ideal liquid. in noncentral collisions, because of the large orbital momentum, such a system might be the fluid with the highest vorticity ever created under laboratory conditions. particles emerging from such a highly vorticous ... | global hyperon polarization at local thermodynamic equilibrium with vorticity, magnetic field, and feed-down |
we propose an extension of the bms group, which we refer to as weyl bms or bmsw for short, that includes super-translations, local weyl rescalings and arbitrary diffeomorphisms of the 2d sphere metric. after generalizing the barnich-troessaert bracket, we show that the noether charges of the bmsw group provide a center... | the weyl bms group and einstein's equations |
dirac is a freely distributed general-purpose program system for one-, two-, and four-component relativistic molecular calculations at the level of hartree-fock, kohn-sham (including range-separated theory), multiconfigurational self-consistent-field, multireference configuration interaction, electron propagator, and v... | the dirac code for relativistic molecular calculations |
we extend the post-minkowskian (pm) effective field theory (eft) approach to incorporate conservative and dissipative radiation-reaction effects in a unified framework. this is achieved by implementing the schwinger-keldysh "in-in" formalism and separating conservative and non-conservative terms according to the formul... | radiation-reaction in the effective field theory approach to post-minkowskian dynamics |
determining the equation of state (eos) of dense neutron-rich nuclear matter is a shared goal of both nuclear physics and astrophysics. except possible phase transitions, the density dependence of nuclear symmetry esym(ρ ) is the most uncertain part of the eos of neutron-rich nucleonic matter especially at supra-satura... | towards understanding astrophysical effects of nuclear symmetry energy |
a novel approach to the effective-one-body description of gravitationally interacting two-body systems is introduced. this approach is based on the post-minkowskian approximation scheme (perturbation theory in g , without assuming small velocities) and employs a new dictionary focussing on the functional dependence of ... | gravitational scattering, post-minkowskian approximation, and effective-one-body theory |
we discuss equivalent representations of gravity in the framework of metric-affine geometries pointing out basic concepts from where these theories stem out. in particular, we take into account tetrads and spin connection to describe the so called geometric trinity of gravity. specifically, we consider general relativi... | comparing equivalent gravities: common features and differences |
in this letter we show that a set of old conjectures about symmetries in quantum gravity hold within the anti-de sitter/conformal field theory correspondence. these conjectures are that no global symmetries are possible, that internal gauge symmetries must come with dynamical objects that transform in all irreducible r... | constraints on symmetries from holography |
predicting the dynamics of quantum systems far from equilibrium represents one of the most challenging problems in theoretical many-body physics1,2. while the evolution of a many-body system is in general intractable in all its details, relevant observables can become insensitive to microscopic system parameters and in... | observation of universal dynamics in a spinor bose gas far from equilibrium |
we derive new positivity bounds for low-energy effective field theories (efts) that are not invariant under lorentz boosts. "positivity bounds" are the low-energy manifestation of certain fundamental properties in the uv—to date, they have been used to constrain a wide variety of efts; however, since existing bounds re... | positivity bounds without boosts: new constraints on low energy effective field theories from the uv |
ultra-peripheral collisions (upcs) have been a significant source of study at rhic and the lhc. in these collisions, the two colliding nuclei interact electromagnetically, via two-photon or photonuclear interactions, but not hadronically; they effectively miss each other. photonuclear interactions produce vector meson ... | starlight: a monte carlo simulation program for ultra-peripheral collisions of relativistic ions |
we propose a holographic duality for a four dimensional wess-zumino-witten model with target manifold so(8), coupled to scalar-flat kähler gravity on an asymptotically flat, four dimensional background known as the burns metric. the holographic dual is a two dimensional chiral algebra built out of gauged β -γ systems w... | top-down holography in an asymptotically flat spacetime |
the surface charge algebra of generic asymptotically locally (a)ds4 spacetimes without matter is derived without assuming any boundary conditions. surface charges associated with weyl rescalings are vanishing while the boundary diffeomorphism charge algebra is non-trivially represented without central extension. the λ-... | the λ-bms4 charge algebra |
the soft limits of scattering amplitudes have been extensively studied due to their essential role in the computation of physical observables in collider physics. the universal factorisation that occurs in these kinematic limits has been shown to be related to conservation laws associated with asymptotic, or large, gau... | the sagex review on scattering amplitudes chapter 11: soft theorems and celestial amplitudes |
we develop the covariant phase space formalism allowing for non-vanishing flux, anomalies, and field dependence in the vector field generators. we construct a charge bracket that generalizes the one introduced by barnich and troessaert and includes contributions from the lagrangian and its anomaly. this bracket is uniq... | extended corner symmetry, charge bracket and einstein's equations |
we propose an extension of the symmetric teleparallel gravity, in which the gravitational action l is given by an arbitrary function f of the non-metricity q and of the trace of the matter-energy-momentum tensor t, so that l=f(q,t). the field equations of the theory are obtained by varying the gravitational action with... | f( q, t) gravity |
we study the variance in the measurement of observables during scattering events, as computed using amplitudes. the classical regime, characterised by negligible uncertainty, emerges as a consequence of an infinite set of relationships among multileg, multiloop amplitudes in a momentum-transfer expansion. we discuss tw... | the uncertainty principle and classical amplitudes |
we derive a closed-form expression of the orbit of minkowski spacetime under arbitrary diff( s 2) super-lorentz transformations and supertranslations. such vacua are labelled by the superboost, superrotation and supertranslation fields. impulsive transitions among vacua are related to the refraction memory effect and t... | superboost transitions, refraction memory and super-lorentz charge algebra |
for the first time, a gravitational calculation was recently shown to yield the page curve for the entropy of hawking radiation, consistent with unitary evolution. however, the calculation takes as essential input hawking's result that the radiation entropy becomes large at late times. we call this apparent contradicti... | gravity/ensemble duality |
we show that self-dual gravity in euclidean four-dimensional anti-de sitter space (ads4 ) can be described by a scalar field with a cubic interaction written in terms of a deformed poisson bracket, providing a remarkably simple generalization of the plebanski action for self-dual gravity in flat space. this implies a n... | self-dual gravity and color-kinematics duality in ads4 |
we give an introduction into quantum cosmology with emphasis on its conceptual parts. after a general motivation, we review the formalism of canonical quantum gravity on which discussions of quantum cosmology are usually based. we then present the minisuperspace wheeler-dewitt equation and elaborate on the problem of t... | quantum cosmology |
we examine holographic complexity in the doubly holographic model introduced in [1, 2] to study quantum extremal islands. we focus on the holographic complexity=volume (cv) proposal for boundary subregions in the island phase. exploiting the fefferman-graham expansion of the metric and other geometric quantities near t... | quantum extremal islands made easy. part iii. complexity on the brane |
we demonstrate the universality of the gravitational classical deflection angle of massless particles through o (g3) by studying the high-energy limit of full two-loop four-graviton scattering amplitudes in pure einstein gravity as well as n ≥4 supergravity. as a by-product, our first-principles calculation provides a ... | universality in the classical limit of massless gravitational scattering |
the conventional gravitational memory effect is a relative displacement in the position of two detectors induced by radiative energy flux. we find a new type of gravitational `spin memory' in which beams on clockwise and counterclockwise orbits acquire a relative delay induced by radiative angular momentum flux. it has... | new gravitational memories |
we obtain the quadratic-in-spin terms of the conservative hamiltonian describing the interactions of a binary of spinning bodies in general relativity through o (g2) and to all orders in velocity. our calculation extends a recently-introduced framework based on scattering amplitudes and effective field theory to consid... | quadratic-in-spin hamiltonian at o (g2) from scattering amplitudes |
motivated by recent discussions of fractons, we explore nonrelativistic field theories with a continuous global symmetry, whose charge is a spatial vector. we present several such symmetries and demonstrate them in concrete examples. they differ by the equations their noether currents satisfy. simple cases, other than ... | field theories with a vector global symmetry |
we put forward a new definition of complexity, for static and spherically symmetric self-gravitating systems, based on a quantity, hereafter referred to as complexity factor, that appears in the orthogonal splitting of the riemann tensor, in the context of general relativity. we start by assuming that the homogeneous (... | new definition of complexity for self-gravitating fluid distributions: the spherically symmetric, static case |
we extract the long-range gravitational potential between two scalar particles with arbitrary masses from the two-to-two elastic scattering amplitude at 2nd post-minkowskian order in arbitrary dimensions. in contrast to the four-dimensional case, in higher dimensions the classical potential receives contributions from ... | second-order post-minkowskian scattering in arbitrary dimensions |
we reconstruct the lorentzian graviton propagator in asymptotically safe quantum gravity from euclidean data. the reconstruction is applied to both the dynamical fluctuation graviton and the background graviton propagator. we prove that the spectral function of the latter necessarily has negative parts similar to, and ... | reconstructing the graviton |
an exponential representation of the s-matrix provides a natural framework for understanding the semi-classical limit of scattering amplitudes. while sharing some similarities with the eikonal formalism it differs from it in details. computationally, rules are simple because pieces that must be subtracted are given by ... | on an exponential representation of the gravitational s-matrix |
we provide a gravitational argument in favour of the covariant holographic entanglement entropy proposal. in general time-dependent states, the proposal asserts that the entanglement entropy of a region in the boundary field theory is given by a quarter of the area of a bulk extremal surface in planck units. the main e... | deriving covariant holographic entanglement |
recent progress in the formulation of relativistic hydrodynamics for particles with spin one-half is reviewed. we start with general arguments advising introduction of a tensor spin chemical potential that plays a role of the lagrange multiplier coupled to the spin angular momentum. then, we turn to a discussion of spi... | relativistic hydrodynamics for spin-polarized fluids |
the metric-affine variational principle is applied to generate teleparallel and symmetric teleparallel theories of gravity. from the latter we discover an exceptional class which is consistent with a vanishing affine connection. based on this remarkable property, this work proposes a simpler geometrical formulation of ... | coincident general relativity |
we propose a codimension-two holography between a gravitational theory on a d +1 dimensional wedge spacetime and a d -1 dimensional cft which lives on the corner of the wedge. formulating this as a generalization of ads /cft , we explain how to compute the free energy, entanglement entropy and correlation functions of ... | codimension-two holography for wedges |
we exploit the close relationship between the carroll and fracton/dipole algebras, together with the method of coadjoint orbits, to define and classify classical carroll and fracton particles. this approach establishes a carroll/fracton correspondence and provides an answer to the question "what is a fracton?".under th... | carroll/fracton particles and their correspondence |
we propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observables. in the first proposal, only genuinely propagating gravitons are included, while, in the second, zero-frequency modes are added in order... | classical gravitational observables from the eikonal operator |
we study modular hamiltonians corresponding to the vacuum state for deformed half-spaces in relativistic quantum field theories on {{r}}^{1,d-1} . we show that in addition to the usual boost generator, there is a contribution to the modular hamiltonian at first order in the shape deformation, proportional to the integr... | modular hamiltonians for deformed half-spaces and the averaged null energy condition |
we argue that the complex transformation relating the schwarzschild to the taub-nut metric, introduced by talbot, is in fact an electric-magnetic duality transformation. we show that at null infinity, the complex transformation is equivalent to a complexified bondi-metzner-sachs supertranslation, which rotates the supe... | double copy of electric-magnetic duality |
we implement an extended version of reflection positivity (wick-rotated unitarity) for invertible topological quantum field theories and compute the abelian group of deformation classes using stable homotopy theory. we apply these field theory considerations to lattice systems, assuming the existence and validity of lo... | reflection positivity and invertible topological phases |
the geometrical nature of gravity emerges from the universality dictated by the equivalence principle. in the usual formulation of general relativity, the geometrisation of the gravitational interaction is performed in terms of the spacetime curvature, which is now the standard interpretation of gravity. however, this ... | the geometrical trinity of gravity |
revised translation of kaluza's historic 1921 paper, "zum unitätsproblem der physik," on 5-dimensional spacetime, used to unify gravity and electromagnetism. this version is based, in part, on a 1984 translation provided by t. muta, but revised and formatted using latex to closely match the original paper in appearance... | on the unification problem in physics |
this technical note (lisa reference lisa-lcst-sgs-tn-001) describes the computation of the noise power spectral density, the sensitivity curve and the signal-to-noise ratio for lisa (laser interferometer antenna). it is an applicable document for esa (european space agency) and the reference for the lisa science requir... | lisa sensitivity and snr calculations |
we propose a universal inequality that unifies the bousso bound with the classical focusing theorem. given a surface σ that need not lie on a horizon, we define a finite generalized entropy sgen as the area of σ in planck units, plus the von neumann entropy of its exterior. given a null congruence n orthogonal to σ , t... | quantum focusing conjecture |
we review the role that infinite-dimensional symmetries arising at the boundary of asymptotically flat spacetimes play in the context of the celestial holography program. once recast into the language of conformal field theory, asymptotic symmetries provide key constraints on the sought-for celestial dual to quantum gr... | celestial holography: an asymptotic symmetry perspective |
as recent work continues to demonstrate, the study of relativistic scattering processes leads to valuable insights and computational tools applicable to the relativistic bound-orbit two-body problem. this is particularly relevant in the post-minkowskian approach to the gravitational two-body problem, where the field ha... | conservative and radiative dynamics in classical relativistic scattering and bound systems |
we analyze a gedankenexperiment previously considered by mari et al. [sci. rep. 6, 22777 (2016)., 10.1038/srep22777] that involves quantum superpositions of charged and/or massive bodies ("particles") under the control of the observers, alice and bob. in the electromagnetic case, we show that the quantization of electr... | quantum superposition of massive objects and the quantization of gravity |
in this review we study quantum field theories and conformal field theories with global symmetries in the limit of large charge for some of the generators of the symmetry group. at low energy the sectors of the theory with large charge are described by a hybrid form of goldstone's theorem, involving its relativistic an... | selected topics in the large quantum number expansion |
we employ the gravitational decoupling approach for static and spherically symmetric systems to develop a simple and powerful method in order to (a) continuously isotropize any anisotropic solution of the einstein field equations, and (b) generate new solutions for self-gravitating distributions with the same or vanish... | isotropization and change of complexity by gravitational decoupling |
we present the complete first order relativistic quantum kinetic theory with spin for massive fermions derived from the wigner function formalism in a concise form that shows explicitly how the 32 wigner equations reduce in practice to 4 independent transport equations. we solve the modified on-shell conditions to obta... | relativistic quantum kinetic theory for massive fermions and spin effects |
this is an introduction to, and invitation to read, a series of review articles on scattering amplitudes in gauge theory, gravity, and superstring theory. our aim is to provide an overview of the field, from basic aspects to a selection of current (2022) research and developments. *this work was supported by the europe... | the sagex review on scattering amplitudes |
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