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Article
Physics, Particles & Fields
Gary T. Horowitz et al.
Summary: We studied the geometry near the horizon of a four-dimensional extremal black hole. When the cosmological constant is negative, we found that tidal forces diverge as one crosses the horizon, and this singularity is stronger for larger black holes. This applies to generic nonspherical black holes, and all scalar curvature invariants remain finite. Furthermore, nonextremal black holes have tidal forces that diverge in the extremal limit, reflecting in anomalous scaling of the specific heat with temperature holographically. Similar, albeit weaker, effects are present when the cosmological constant is positive, but not when it vanishes.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Batoul Banihashemi et al.
Summary: The entropy of the cosmological horizon in the static patch of de Sitter space is reduced by the addition of Killing energy, causing confusion in understanding its thermodynamics. This confusion is resolved by introducing a system boundary at which a proper thermodynamic ensemble can be specified. The first law then becomes the statement that the generalized entropy is stationary, considering the thermalized and matter contributions.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Arjun Kar et al.
Summary: In this study, we propose a non-perturbative description of a 2D dilaton-gravity theory with a vanishing cosmological constant and black holes using a double-scaled Hermitian random matrix model. The model computes the partition function for the asymptotic Bondi Hamiltonian. By constructing the gauge-invariant asymptotic phase space, determining relevant asymptotic boundary conditions, and computing the classical S-matrix, we establish the connection and provide insight into the interpretation of the Euclidean path integral. We also match the topological expansion of the matrix model to all orders, allowing us to compute fine-grained Bondi spectrum and other observables, and construct asymptotic Hilbert spaces. Additionally, we study the semi-classical dynamics of the finite cut-off theory coupled with probe matter and find evidence of maximally chaotic behavior in out-of-time-order correlators. Finally, we discuss a strategy for constructing the non-perturbative S-matrix coupled with probe matter and comment on the treatment of black holes in celestial holography.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Daniel Grumiller et al.
Summary: This article introduces the generalized dilaton gravity model in 2D, which is the most general deformation of the Jackiw-Teitelboim model that maintains local Lorentz invariance. These models are exactly soluble in certain cases and have some interesting properties in holography.
Article
Physics, Multidisciplinary
Arjun Kar et al.
Summary: This study constructs a Hermitian random matrix model to provide a stable nonperturbative completion of Cangemi-Jackiw gravity theory and computes observables in flat space quantum gravity to characterize the Bondi Hamiltonian spectrum. The implications of these results for the flat space S-matrix and black holes are discussed.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
Dionysios Anninos et al.
Summary: This study investigates dilaton-gravity models that contain a significant portion of the static patch of dS(2) and examines their thermodynamic properties. The findings show that these geometries can exhibit local or even global thermodynamic stability within certain temperature ranges.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Evan Coleman et al.
Summary: We obtain microstates and a subleading logarithmic correction accounting for the Gibbons-Hawking entropy in dS(3) by deforming a seed CFT with sparse light spectrum using the solvable T (T) over bar + Lambda(2). These microstates arise from the dressed CFT states near dimension Delta = c/6, which are associated with the Hawking-Page transition and dominate the real spectrum of the deformed theory. We demonstrate an analog of the Hawking-Page transition in de Sitter. Generalizations of the T (T) over bar + Lambda(2) deformation are necessary to handle model-dependent local bulk physics (subleading at large central charge) and higher dimensions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Andrew Svesko et al.
Summary: This paper studies the semi-classical thermodynamics of two-dimensional de Sitter space in Jackiw-Teitelboim gravity, coupled with conformal matter. The study derives the quasi-local energy and the generalized entropy by introducing a timelike boundary in the static patch. The findings provide a first principles derivation of the island rule for U(1) symmetric dS(2) backgrounds.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Upamanyu Moitra et al.
Summary: We discuss the second order formulation of JT gravity in AdS and dS space. For the pure dS JT theory without matter, we find that the path integral leads to the Hartle-Hawking wave function or transition amplitudes, which describe the creation of disconnected universes or the transition from contracting to expanding universes. These processes can be described by a hologram consisting of Random Matrix Theory (RMT) or SYK theory. In the presence of matter, we investigate the double trumpet path integral and propose a method to avoid moduli space divergence, allowing the system to tunnel from contracting to expanding phase with interesting scale-invariant departures. We also explain how suitable correlators can avoid divergence in moduli space and suggest that a hologram using SYK theory with additional matter could eliminate these divergences. Finally, we analyze the AdS double trumpet geometry and show that the divergence in moduli space cannot be eliminated by switching to the micro-canonical ensemble for the spectral form factor.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Juan Maldacena et al.
Summary: This study focuses on aspects of the de Sitter version of Jackiw-Teitelboim gravity, exploring the boundary mode's gravitational corrections to cosmological observables and examining contributions from different topologies. By computing no-boundary wavefunctions and probability measures, the research also highlights the dominance of two-dimensional nearly de Sitter gravity dynamics on certain observables.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alejandra Castro et al.
Summary: In this study, holographic properties of near-AdS2 spacetimes within spherically symmetric configurations of N=2 4D U(1)(4) supergravity are described, showing that the response in the near-AdS2 region is not universal and is sensitive to properties of the background and the theory. The spectrum of operators is shown to be dual to the matter fields, with their cubic interactions being influenced by whether the background is supersymmetric or not, and if the theory is gauged or ungauged. These differences have implications on the quantum nature of microstates of near-extremal black holes.
Article
Physics, Multidisciplinary
Alejandra Castro et al.
Summary: This study focuses on a two-dimensional theory of gravity coupled to matter to describe the holographic properties of five-dimensional black holes with two equal angular momenta. By computing corrections to correlation functions due to cubic interactions, it is found that the corrections do not have a definite sign and depend on the mass of the extremal solution for AdS5 black holes. Possible interpretations of these corrections from a gravitational and holographic perspective are discussed, along with quantifying the impact of the JT sector on the UV region of the black hole.
Article
Physics, Particles & Fields
Victor Godet et al.
Summary: The study focuses on cap gravity supergravity, revealing its role in the near-horizon perturbations of non-extremal black holes and its connection to Jackiw-Teitelboim gravity. The model's simplicity allows for exact calculations and exploration of phenomena, as well as proposing a non-perturbative completion in the form of a matrix model. This research also discusses the existence of flat wormhole solutions within this model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alejandra Castro et al.
CLASSICAL AND QUANTUM GRAVITY
(2020)
Article
Physics, Particles & Fields
Miguel Montero et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Hamid Afshar et al.
Article
Physics, Particles & Fields
Finn Larsen
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Dionysios Anninos et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
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Physics, Particles & Fields
Pranjal Nayak et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
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Physics, Particles & Fields
Alejandra Castro et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Particles & Fields
Oscar J. C. Dias et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
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Physics, Particles & Fields
Ahmed Almheiri et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
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Physics, Particles & Fields
Mirjam Cvetic et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Physics, Multidisciplinary
Juan Maldacena et al.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2016)
Article
Physics, Particles & Fields
Ahmed Almheiri et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Astronomy & Astrophysics
Brian P. Dolan et al.
Review
Physics, Nuclear
Dionysios Anninos
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2012)
Article
Physics, Particles & Fields
Dionysios Anninos et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2010)
Article
Physics, Particles & Fields
Dionysios Anninos et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2010)
Article
Astronomy & Astrophysics
Robert B. Mann et al.
CLASSICAL AND QUANTUM GRAVITY
(2006)
Article
Physics, Particles & Fields
J Maldacena
JOURNAL OF HIGH ENERGY PHYSICS
(2003)
Article
Physics, Particles & Fields
A Strominger
JOURNAL OF HIGH ENERGY PHYSICS
(2001)
