Article
Physics, Particles & Fields
Seyed Ali Hosseini Mansoori, Li Li, Morteza Rafiee, Matteo Baggioli
Summary: This study investigates holographic flows in the context of massive gravity theories driven by a relevant scalar operator, revealing the mechanisms and singular behaviors of these flows. It is found that the instability triggered by the scalar field leads to a rapid collapse of the Einstein-Rosen bridge, ultimately evolving into a spacetime singularity.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yan Liu, Hong-Da Lyu, Avinash Raju
Summary: The study focuses on the behavior of black hole singularities during the Hawking-Page phase transitions, finding that the Kasner exponents are continuous and nondifferentiable during second order phase transitions, but discontinuous during first order phase transitions. Arguments on the universality of this behavior are presented, along with discussions on possible observables in the dual field theory encoding the Kasner exponents.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
William D. Biggs, Jorge E. Santos
Summary: We construct the holographic duals to a large N, strongly coupled N = 4 super Yang-Mills conformal field theory defined on a four-dimensional de Sitter-Schwarzschild background. There are two distinct five-dimensional bulk solutions: the static black tunnel with two disconnected horizons, and the black hammock with one horizon in the bulk. The hammock horizon is not a Killing horizon, possessing interesting properties like non-vanishing expansion and shear, and allowing classical flow along it.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Marina David, Alfredo Gonzalez Lezcano, Jun Nian, Leopoldo A. Pando Zayas
Summary: This study investigates logarithmic corrections to the entropy of supersymmetric, rotating, asymptotically AdS(5) black holes and black strings. It uses the AdS/CFT correspondence to determine the entropy on the field theory side. The results show perfect agreement between gravitational and field-theoretic methods, providing a window into precision microstate counting and demonstrating the efficacy of low-energy, symmetry-based approaches for asymptotically AdS black objects under certain conditions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Yi Ling, Yuxuan Liu, Zhuo-Yu Xian
Summary: The study investigates the information paradox of eternal black holes with charges in a doubly-holographic model, involving calculating entanglement entropy and proposing two strategies to address the paradox. The research aims to properly describe the black hole information paradox using enough degrees of freedom on the brane in the doubly-holographic setup.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
Summary: We study the flows of non-supersymmetric attractor black holes and find two types of extremal black hole solutions with attractor mechanism: one smooth at the horizon and the other non-smooth. The former is thermodynamically unstable, while the latter is stable.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Geoff Penington, Stephen H. Shenker, Douglas Stanford, Zhenbin Yang
Summary: Recent work has shown how to obtain the Page curve of an evaporating black hole through holographic computations of entanglement entropy. The validity of these computations is justified using the replica trick and geometries with a spacetime wormhole connecting the different replicas. The Page transition is studied in detail in a simple model by summing replica geometries with different topologies. Related quantities are computed in less detail in more complicated models like JT gravity coupled to conformal matter and the SYK model. Additionally, a direct gravitational argument for entanglement wedge reconstruction is given using the explicit formula known as the Petz map, where the spacetime wormhole plays a significant role. The interpretation of the wormhole geometries as part of some ensemble average implicit in the gravity description is also discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Meng-Ting Wang, Hong-Yue Jiang, Yu-Xiao Liu
Summary: The connection between quantum information and quantum gravity has attracted the interest of physicists. A new class of gravitational observables has been proposed to explore holographic complexity. This paper investigates the generalized volume-complexity for the Reissner-Nordstrom-AdS black hole in 4 dimensions. The findings suggest a discontinuous variation in bulk physics that represents the complexity of the thermofield double state defined on the boundary.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Xuanhua Wang, Ran Li, Jin Wang
Summary: By applying the quantum extremal surface construction, we calculated the Page curve for eternal Reissner-Nordstrom black holes, ignoring backreaction and the greybody factor. The inclusion of islands outside the horizon of the black hole results in the entanglement entropy of Hawking radiation reproducing the Bekenstein-Hawking entropy with an additional term representing the effect of matter fields, helping to address the black hole information paradox.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yuxuan Liu, Qian Chen, Xiao-Xiong Zeng, Hongbao Zhang, Wenliang Zhang
Summary: The study reveals that the radius of the Einstein ring in the lensed response of a charged AdS black hole is independent of the chemical potential, showing behavior similar to weakly interacting quantum systems. Furthermore, the temperature dependence of the radius of such a ring exhibits a distinct feature with a significant increase at low temperatures, while the ring remains unchanged at the edge of the screen for weakly interacting systems. This distinctive feature is attributed to the high energy modes of strongly coupled systems with a gravity dual.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Krishan Saraswat, Niayesh Afshordi
Summary: This study investigates the evaporation rate of spherically symmetric black holes affected by radiation extraction near the horizon, showing that the rate can be altered depending on the placement of an absorptive screen near the horizon. Modifications to the scrambling time defined by Pennington's work are found, with logarithmic corrections dependent on the screen placement. Furthermore, the study suggests that the screen cannot be placed arbitrarily close to the horizon, leading to the conclusion that black hole mining using a screen may not significantly impact the black hole's lifetime.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
A. Ramesh Chandra, Jan de Boer, Mario Flory, Michal P. Heller, Sergio Hortner, Andrew Rolph
Summary: The proposed finite cutoff regions of holographic spacetimes represent quantum circuits mapping between boundary states at different times, with complexity determined by gravitational action and minimized by optimal circuits. Surfaces of constant scalar curvature play a special role in optimizing quantum circuits.The proposed connection to kinematic space and discussion of possible circuit representations of gravitational action provide further insights.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Wen-Cong Gan, Dong-Hui Du, Fu-Wen Shu
Summary: This paper extends the study of asymptotic flat black holes by discussing the island rule in vacuum states. The emergence of the island at late times and its boundary's dependence on the position of the cutoff surface are observed, which is different from the case of eternal black holes. Different states have a significant impact on the entropy in the island formula, leading to different results for the Page time.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Guglielmo Grimaldi, Juan Hernandez, Robert C. Myers
Summary: The study focuses on two-dimensional eternal black holes with non-zero mass, interacting with a CFT on a circle. By computing the Page curve, it is found that the entropy rises linearly at early times and remains constant at late times, depending on the size of the thermal baths. The critical size and Page time are proportional to the ratio of the central charges of the conformal defect and the bath CFT.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Pawel Caputa, Diptarka Das, Sumit R. Das
Summary: In this article, we explore the properties of path integral complexity in field theories on time-dependent backgrounds using the dual description in terms of Hartle-Hawking wavefunctions. Our findings show that holographic path integral complexity decreases as the singularity is approached, consistent with previous results from holographic complexity conjectures. Additionally, we identify examples where the complexity becomes universal, independent of the Kasner exponents, while the properties of the path integral tensor networks are sensitive to this data.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
William D. Biggs, Jorge E. Santos
Summary: In this study, rotating black hole solutions in the Randall-Sundrum II (RSII) model are found by numerically solving a three-dimensional PDE problem. The area and equatorial innermost stable orbits of these solutions are computed. The results show that for large black holes compared with the AdS length scale, the black hole behaves as a four-dimensional object approaching the Kerr metric on the brane, while for small black holes, the solution tends to a five-dimensional Myers-Perry black hole with a single nonzero rotation parameter aligned with the brane. This departure from exact four-dimensional gravity in RSII model may lead to different predictions for rotating black holes compared to standard four-dimensional general relativity.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
Oscar J. C. Dias, Gary T. Horowitz, Jorge E. Santos
Summary: This study focuses on a family of charged black holes that develop scalar hair as their charge increases at fixed mass. Surprisingly, the maximum charge for a given mass corresponds to a nonsingular hairy black hole with nonzero Hawking temperature. The implications for Hawking evaporation are discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Oscar J. C. Dias, Gary T. Horowitz, Jorge E. Santos
Summary: We studied the interior of a family of asymptotically flat, charged black holes that develop scalar hair as charge increases. These black holes resemble the interior of a holographic superconductor and exhibit analogs of Josephson oscillations of the scalar field. The presence of Cauchy horizons in a large class of stationary black holes with scalar hair was argued against in an appendix.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Filippo Camilloni, Oscar J. C. Dias, Gianluca Grignani, Troels Harmark, Roberto Oliveri, Marta Orselli, Andrea Placidi, Jorge E. Santos
Summary: This study focuses on the BZ split-monopole model, resolving issues around outer light surface behavior, presenting a new perturbative approach extended to higher orders, improving consistency with numerical simulations, and proposing a novel numerical procedure.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Alex Davey, Oscar J. C. Dias, Paul Rodgers, Jorge E. Santos
Summary: This article discusses the violations and respects of Strong Cosmic Censorship (SCC) in different types of black holes in various spacetime dimensions. It also explores the characteristics of the scalar field quasinormal mode spectra related to SCC.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Oscar J. C. Dias, Mahdi Godazgar, Jorge E. Santos
Summary: The frequency spectra of gravito-electromagnetic perturbations of the KN black hole have been computed and it has been found that there are two families of QNMs that display eigenvalue repulsion. The perturbation equations can be solved analytically using a near-horizon expansion, providing a good approximation to the numerical data near-extremality. This manuscript provides an extended study of these properties, including the derivation of a gauge invariant system of coupled PDEs, frequency approximations, and a deeper understanding of eigenvalue repulsion.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Donald Marolf, Jorge E. Santos
Summary: This study examines the stability of black hole saddles inside a spherical reflecting cavity, finding that coupled modes can be diagonalized in the Lichnerowicz operator to define a natural generalization of the pure-trace Wick-rotation recipe. This recipe reproduces the expected result from black hole thermodynamics, where large Euclidean black holes are stable saddles while small Euclidean black holes are unstable.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Gary T. Horowitz, Maciej Kolanowski, Jorge E. Santos
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
Donald Marolf, Jorge E. Santos
Summary: This study resolves the tension between the stability of the microcanonical ensemble for gravitating systems and the rapid decay of the negative mode of Schwarzschild black holes. By constructing the microcanonical partition function and applying Wick rotations, we obtained a positive definite action for linear perturbations. Most of the study was conducted in a cavity with reflecting boundary conditions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
William D. Biggs, Jorge E. Santos
Summary: We construct the holographic duals to a large N, strongly coupled N = 4 super Yang-Mills conformal field theory defined on a four-dimensional de Sitter-Schwarzschild background. There are two distinct five-dimensional bulk solutions: the static black tunnel with two disconnected horizons, and the black hammock with one horizon in the bulk. The hammock horizon is not a Killing horizon, possessing interesting properties like non-vanishing expansion and shear, and allowing classical flow along it.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Gary T. Horowitz, Maciej Kolanowski, Jorge E. Santos
Summary: In holography, the IR behavior of a quantum system at nonzero density is described by the near horizon geometry of an extremal charged black hole. It is commonly believed that for systems on S-3, this near horizon geometry is AdS(2) x S-3. However, we show that this is not the case and propose a new near horizon geometry that is stable under certain perturbations and develops in nonextremal, SO(3)-invariant charged black holes. Our findings suggest that the previously believed stable IR fixed point is not accurate.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Oscar J. C. Dias, Prahar Mitra, Jorge E. Santos
Summary: We systematically search for supergravity solutions that are dual to thermal states in N = 4 SYM at finite chemical potential via the AdS(5)/CFT4 correspondence. These solutions dominate the microcanonical ensemble and are required for reproducing the microscopic entropy of AdS black holes. Using analytical and numerical methods, we construct and study static charged hairy solitonic and black hole solutions with global AdS(5) asymptotics. Our findings provide a good understanding of the full phase space of SYM thermal states with three arbitrary chemical potentials, along with the known phases of the truncation with three equal charges.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Oscar J. C. Dias, Takaaki Ishii, Keiju Murata, Jorge E. Santos, Benson Way
Summary: We construct a cohomogeneity-1 helical black string in six-dimensional Einstein gravity originating from the superradiant instability of the Myers-Perry black string. The helical black string possesses helical isometries generated by linear combinations of time translation, shifts along the string, and rotation, which are individually broken by the superradiant instability. Despite the absence of momentum in the string direction, the helical black string exhibits nonzero horizon velocity.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Oscar J. C. Dias, Mahdi Godazgar, Jorge E. Santos, Gregorio Carullo, Walter Del Pozzo, Danny Laghi
Summary: The study focused on gravitational and electromagnetic perturbations of the Kerr-Newman black hole, identifying unique phenomena in the Quasinormal Mode families. The derived QNM spectra are crucial for understanding gravitational emissions in astrophysical environments and extracting observational implications of new physics scenarios.
Article
Astronomy & Astrophysics
Gregorio Carullo, Danny Laghi, Nathan K. Johnson-McDaniel, Walter Del Pozzo, Mahdi Godazgar, Jorge E. Santos, Oscar J. C. Dias
Summary: We constructed a template to study the postmerger phase of a binary black hole coalescence with a remnant U(1) charge. Our analysis showed that it is difficult to distinguish between charged and uncharged hypotheses based on purely postmerger analysis. However, by analyzing the full signal, we were able to obtain upper limits on the black hole charge-to-mass ratio. This model can provide a robust measurement of the charge-to-mass ratio for certain values when simulating a loud signal observed by the LIGO-Virgo network.