Article
Physics, Particles & Fields
Tanay Kibe, Sukrut Mondkar, Ayan Mukhopadhyay, Hareram Swain
Summary: This study explores how the black hole complementarity principle can arise from quantum gravitational dynamics using a local semiclassical approximation. The findings suggest that the decoupling of different degrees of freedom is crucial for replicating infalling information without cloning it. The study also reveals that hair, which retains a residual time-dependent quantum state, can mirror infalling information after a decoupling time.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
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
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
Marina David, Jun Nian
Summary: Researchers calculated the Bekenstein-Hawking entropy of near-extremal AdS(4) electrically charged rotating black holes using three different methods and found a unique and universal expression for the entropy and microstate counting via the AdS/CFT correspondence. They extended the Kerr/CFT correspondence to the near-extremal case, computed the left and right central charges, and utilized hidden conformal symmetry to calculate the Frolov-Thorne temperatures for the near-horizon geometry, providing a microscopic foundation for Hawking radiation.
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
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
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
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
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
Chang-Zhong Guo, Wen-Cong Gan, Fu-Wen Shu
Summary: This study applies the quantum extremal surface construction to the step-function Vaidya model of evaporating black holes, and finds that the location of the entanglement island boundary depends on the value of 8M - vA + vI when cutoff surface A is in Minkowski region III. Moreover, it is observed that the entanglement island still exists and partial derivative I is located on an equal-time Cauchy surface of observer A when cutoff surface A is in Minkowski region III after the black hole completely evaporates.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin
Summary: The study utilizes the replica method to compute the entanglement entropy of a universe without gravity entangled with a disjoint gravitating universe in a quantum state. It reveals that at high entanglement temperatures, the island in the gravitating universe contributes to a bound on entanglement entropy in a manner akin to evaporating black holes. Additionally, it demonstrates that the entanglement wedge of the non-gravitating universe expands with increasing entanglement temperature, ultimately allowing for complete reconstruction of the gravitating universe.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alexandre Belin, Jan de Boer
Summary: The study proposes an ansatz for OPE coefficients in chaotic conformal field theories, generalizing the eigenstate thermalization hypothesis and describing heavy operators as random variables with a Gaussian distribution. By applying this ansatz in two dimensions, higher moments of OPE coefficients can be calculated and analyzed, while also relating them to genus-2 partition functions and their squares in the context of AdS(3) Einstein gravity solutions. The research suggests that calculations based on the semi-classical low-energy gravitational theory are primarily affected by the random nature of OPE coefficients, explaining the lack of factorization in partition function products.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Physics, Particles & Fields
Mert Besken, Jan de Boer, Gregoire Mathys
Summary: In Lorentzian CFTs, general properties of commutators of local operators are discussed, obtained through analytic continuation of the Euclidean operator product expansion. Explicit computations are provided for commutators of stress-tensor components in two and four-dimensional CFTs, along with rederived familiar results and considerations of light-ray operators. An infinite set of well-defined light-ray operators built from the stress-tensor in four-dimensional CFT is defined, maintaining similar properties to their two-dimensional analogues.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Vijay Balasubramanian, Arjun Kar, Tomonori Ugajin
Summary: We study the entangled pure state of two disjoint universes. The presence of gravity in one or both universes leads to modifications in the calculation of the entropy. When only one universe has gravity, a wormhole between the copies of the gravitating universe is included in the entropy formula. When both universes have gravity, a novel wormhole with multiple boundaries connecting replica copies of both universes dominates the path integral. The contribution from this wormhole restores unitarity.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Physics, Multidisciplinary
Nicolas Chagnet, Shira Chapman, Jan de Boer, Claire Zukowski
Summary: The study explores the circuit complexity of conformal field theory states in arbitrary dimensions, with circuits moving along a unitary representation of the Lorentzian conformal group. Different choices of distance functions are understood in terms of the geometry of coadjoint orbits of the conformal group. The study explicitly relates circuits to timelike geodesics in anti-de Sitter space, and the complexity metric to distances between these geodesics, extending the method to circuits in other symmetry groups using a group theoretic generalization of coherent states concept.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Multidisciplinary
Bowen Chen, Bartlomiej Czech, Zi-Zhi Wang
Summary: In this paper, we provide a pedagogical review of the application of concepts from quantum information theory and gravitational theory in the anti-de Sitter/conformal field theory correspondence. We introduce various concepts and techniques, and aim to give researchers a working knowledge in this field for initiating original projects.
REPORTS ON PROGRESS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Alexandre Belin, Jan de Boer, Pranjal Nayak, Julian Sonner
Summary: In this paper, we generalize the eigenstate thermalization hypothesis to systems with global symmetries and present two versions considering microscopic charge conservation and exponentially suppressed violations. These versions agree for correlation functions of simple operators, but differ in the variance of charged one-point functions at finite temperature. Applying these ideas to holography and gravitational low-energy effective theories, we find that Euclidean wormholes predict a non-zero variance for charged one-point functions, which contradicts microscopic charge conservation. This implies that global symmetries in quantum gravity must either be gauged or explicitly broken by non-perturbative effects.
Article
Physics, Particles & Fields
Jan de Boer, Ricardo Espindola, Bahman Najian, Dimitrios Patramanis, Jeremy van Der Heijden, Claire Zukowski
Summary: We study the parallel transport of modular Hamiltonians encoding entanglement properties of a state. In the case of 2d CFT, we find that the parallel transport process corresponds to a symplectic form in Euclidean geometry, which plays an important role in the entanglement wedge.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jan de Boer, Jelle Hartong, Niels A. Obers, Watse Sybesma, Stefan Vandoren
Summary: Carroll symmetry, arising from the limit of vanishing speed of light, is studied and constraints on the energy-momentum tensor are determined. The findings suggest that Carroll symmetry may be relevant for dark energy and inflation.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Particles & Fields
Alexandre Belin, Jan de Boer, Diego Liska
Summary: The study investigates non-Gaussian corrections to the statistical distribution of heavy-heavy-heavy OPE coefficients in chaotic two-dimensional conformal field theories, finding that these corrections are further exponentially suppressed in the entropy, much like the Eigenstate Thermalization Hypothesis.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Tarek Anous, Alexandre Belin, Jan de Boer, Diego Liska
Summary: New asymptotic formulas for the distribution of OPE coefficients in conformal field theories are presented. These formulas, derived from crossing symmetry, involve products of multiple coefficients and introduce non-gaussianities into the statistical distribution.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Bartlomiej Czech, Sirui Shuai
Summary: The holographic entropy cone is used to identify entanglement entropies of field theory regions. This study points out that average entropies of p-partite subsystems can be similarly analyzed for arbitrarily many regions. It is conjectured that the holographic cone of average entropies is simplicial and combines features of perfect tensor and bipartite entanglement.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Particles & Fields
Bartlomiej Czech, Yunfei Wang
Summary: In holographic duality, semiclassical bulk duals of boundary states are subject to inequalities that restrict the von Neumann entropies of their subsystems. Existing inequalities only apply to up to N = 5 disjoint subsystems, but we have discovered a new inequality involving N = 7 disjoint regions. Our findings support a recent conjecture on the structure of holographic inequalities and provide insights into the potential for further exploration using similar tactics.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Vijay Balasubramanian, Pawel Caputa, Javier M. Magan, Qingyue Wu
Summary: We propose a measure of quantum state complexity by minimizing the spread of wave function over different choices of basis. This measure is controlled by the survival amplitude for a state to remain unchanged and can be efficiently computed in theories with discrete spectra. It generalizes Krylov operator complexity to quantum states for continuous Hamiltonian evolution. By applying our method to various systems, we reveal four regimes in the time-evolved thermofield double states, showing the same physics as the spectral form factor's slope-dip-ramp-plateau structure.
Article
Physics, Multidisciplinary
Jan de Boer, Victor Godet, Jani Kastikainen, Esko Keski-Vakkuri
Summary: A key task in physics is to determine the state of a system through measurements, with quantum hypothesis testing providing a framework to optimize the process. This involves studying quantum many-body systems and field theory to find optimal measurement strategies. Error estimates in distinguishing similar states involve quantities such as the variance of relative entropy.
SCIPOST PHYSICS CORE
(2021)