Article
Physics, Particles & Fields
Aristomenis Donos, Christiana Pantelidou, Vaios Ziogas
Summary: In this study, holography was utilized to derive effective theories of fluctuations in spontaneously broken phases, with a focus on systems with finite temperature, chemical potential, magnetic field, and momentum relaxation where translations are broken. The hydrodynamic modes corresponding to coupled thermoelectric and density wave fluctuations were analytically constructed, revealing them to be purely diffusive in the system. Introduction of pinning for density waves resulted in some modes acquiring not only a gap, but also a finite resonance due to the presence of a magnetic field. Optical properties were studied and numerical checks of the analytical results were performed. An important outcome of the analysis was the identification of the correct current responsible for heat transport in the system.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Carlo Ewerz, Andreas Samberg, Paul Wittmer
Summary: In this study, holography was utilized to investigate the dynamics of a vortex-anti-vortex dipole in a strongly coupled superfluid in 2+1 dimensions. Numerical real-time simulations were used to track the evolution of vortices as they approached and annihilated each other. Universal trajectories of vortices were identified, while non-universal effects were attributed to numerical artifacts in vortex initialization. Additionally, the dependence of dynamics on superfluid temperature was explored.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Javier Mas, David Travieso Mayo
Summary: This article revisits the case of a real scalar field in global AdS4 under periodic driving. The authors address the issue of adiabatic preparation and deformation of a time-periodic solution corresponding to a Floquet condensate. They carefully study the case of driving close to the normal mode resonant frequencies and examine different slow protocols. The results show that traversing a normal mode frequency has different consequences depending on the sense of the frequency modulation.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Jinwei Chu, Feiyu Deng, Yang Zhou
Summary: The study defines defect extremal surface by minimizing the Ryu-Takayanagi surface corrected by the quantum theory localized on the defect, and extends the results to higher dimensions. It is found that the entropy computed from bulk defect extremal surface is generally less than that from island formula in boundary low energy effective theory, suggesting a smaller entropy from the UV completion of island formula.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Youka Kaku, Keiju Murata, Jun Tsujimura
Summary: The paper introduces a method to observe the photon ring of a superconductor dual to an asymptotically anti-de Sitter black hole on a two-dimensional sphere. By studying the relationship between the electric current and Maxwell field on both gravity and field theory sides, the dissipative part of the electric current is used for imaging the black hole, with results indicating that the charged scalar condensate affects the discontinuous changes in the size of the photon ring.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Upamanyu Moitra, Sunil Kumar Sake, Sandip P. Trivedi
Summary: The study focuses on near-extremal black brane configurations in asymptotically AdS(4) spacetime with slowly varying temperature, chemical potential, and three-velocity. It is found that the Einstein-Maxwell equations can be solved systematically through perturbative expansion, with resulting constitutive relations for stress tensor and charge current being local in the boundary theory. The limit also reveals four linearised modes similar to hydrodynamic modes in conventional fluid mechanics, with some linearised time independent perturbations exhibiting attractor behavior at the horizon under external driving forces in the boundary theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Guoyang Fu, Xi-Jing Wang, Peng Liu, Dan Zhang, Xiao-Mei Kuang, Jian-Pin Wu
Summary: This paper systematically explores the phase structure and behaviors of butterfly velocity in an EMDA model, identifying different mechanisms driving quantum phase transition and discovering a novel QPT in the metal phases.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Mike Blake, Richard A. Davison
Summary: This study explores the connection between many-body quantum chaos and energy dynamics. By investigating the angular distribution of gravitational shock waves and the behavior of energy fluctuations, it is found that the energy density response of metric perturbations exhibits pole-skipping under certain conditions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Xi Dong, Diandian Wang, Wayne W. Weng, Chih-Hung Wu
Summary: We have proved the equivalence of two holographic computations of the butterfly velocity in higher-derivative theories with Lagrangian built from arbitrary contractions of curvature tensors. This study shows that the butterfly velocity can be determined either from a localized shockwave on the horizon of a dual black hole or from certain extremal surfaces defined by entanglement wedge reconstruction. Furthermore, we have provided evidence that this equivalence holds in all gravitational theories, and have obtained some general results on shockwave spacetimes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Yuxuan Liu, Zhuo-Yu Xian, Cheng Peng, Yi Ling
Summary: This article presents three models describing two eternal black holes separated by flat space and entangled by radiation exchange. The entanglement entropy and mutual information among subsystems are computed in the doubly holographic setup to reveal the dynamic phase structure of entanglement. The formation of entanglement is delayed by the space traversed by radiation, with the final state characterized by a connected entanglement wedge or two separate islands depending on the exchange of Hawking modes. Similar phase structures are obtained in the field theory side using two Sachdev-Ye-Kitaev clusters coupled to a Majorana chain. Additionally, a chain model composed of EPR clusters is investigated, reproducing the observed features of entanglement in previous models.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Gabriel Arenas-Henriquez, Felipe Diaz, Yerko Novoa
Summary: We generalize the charged Renyi entropy in the holographic scenario by coupling a non-linear electrodynamics Lagrangian density to AdS gravity. We analyze the thermodynamic features of non-linearly charged hyperbolic black holes and thermal fluctuations in the grand canonical ensemble. We provide a general form for relevant holographic quantities and compute the first thermal fluctuation of the charged Renyi entropy. We demonstrate the validity of the formulas with an analytic example and propose this model to be dual to charged free bosons in 1 + 1 dimensions. We also discuss the interpretation of these results in terms of holography beyond the saddle point approximation.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Tomas Andrade, Christiana Pantelidou, Julian Sonner, Benjamin Withers
Summary: Research shows that black hole horizons may exhibit turbulent spacetime dynamics, which could impact binary mergers and other strong-field phenomena.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Wen-Bin Pan, Ya-Wen Sun
Summary: This paper investigates the method of generating topologically nontrivial gapless hydrodynamic modes in holographic systems and compares it with the approach used in relativistic hydrodynamics. The study is also extended to the case with one extra U(1) current, revealing the possibility of more complex topological phase diagrams.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Shao-Kai Jian, Brian Swingle, Zhuo-Yu Xian
Summary: The concepts of operator size and computational complexity play key roles in the study of quantum chaos and holographic duality, helping characterize the structure of time-evolving Heisenberg operators. The study shows that complexity, well defined in both quantum systems and gravity theories, can serve as a useful measure of operator evolution, exhibiting exponential-to-linear growth behavior in some cases both at early and late times.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Jose D. Edelstein, Nicolas Grandi, Alberto Rivadulla Sanchez
Summary: In this study, the condensation of a charged scalar field in a (3 + 1)-dimensional asymptotically AdS background in the context of Einsteinian cubic gravity was investigated. The results revealed that the critical temperature for the superconducting phase transition decreases as the higher curvature coupling increases.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Jerry Wu, Robert B. Mann
Summary: We present the first examples of phase transitions in asymptotically flat black hole solutions. We find stable temperature regions for otherwise unstable neutral black holes, indicating the existence of multiple stable phases that can coexist at multi-critical points. For charged black holes, multiple first order phase transitions can occur on the stable Gibbs free energy branch, similar to anti-de Sitter (AdS) black holes. The changes in Gibbs free energy are investigated and compared to pressure changes for AdS black hole systems.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
Jerry Wu, Robert B. Mann
Summary: We find that there are multi-critical points, where more than three phases coalesce, in multiply rotating Kerr-anti de Sitter black holes in d-dimensions. Specifically, we present a quadruple point for a triply rotating black hole in d = 8 and a quintuple point for a quadruply rotating black hole in d = 10. The maximal number of distinct phases n is one larger than the maximal number of independent rotations, and we outline a method for obtaining the associated n-tuple point. There are also situations where more than three phases merge at sub-maximal multi-critical points. Our results indicate that multi-critical points in black hole thermodynamics are more common than previously believed, as long as there are a sufficient number of thermodynamic variables.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Physics, Multidisciplinary
Jack Davis, Robie A. Hennigar, Robert B. Mann, Shohini Ghose
Summary: The Majorana stellar representation is used to characterize spin states with maximally negative Wigner quasiprobability distributions. These states exhibit partial symmetry within their star configurations and do not follow an obvious geometric pattern with increasing dimension. They are also different from states that maximize other measures of nonclassicality. Random states have a relatively high amount of negativity, but extremal states and those with similar negativity are statistically rare in Hilbert space. Spin coherent states of arbitrary dimension have non-zero Wigner negativity, suggesting that all pure spin states have non-zero Wigner negativity. These results can be applied to permutation invariant qubit ensembles.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Astronomy & Astrophysics
H. Khodabakhshi, H. Lu, R. B. Mann
Summary: The gravitational Lagrangian can be decomposed into a bulk term and a total derivative term. In certain theories of gravity like Einstein or Lovelock gravities, there are holographic relations between the bulk and the total derivative term, where the latter is determined by the former. However, at the D -> 2 and D -> 4 limits, the bulk terms of Einstein or Gauss-Bonnet theories become total derivatives themselves. Performing the Kaluza-Klein reduction on Einstein and Gauss-Bonnet gravities leads to two-dimensional or four-dimensional scalar-tensor theories respectively. We derived holographic relations for the D = 2 and D = 4 cases, which have the same form as the holographic relations in pure gravity in the foliation independent formalism.
Article
Physics, Particles & Fields
Gareth Arturo Marks, Robert B. Mann, Damian Sheppard
Summary: We study slowly rotating black hole solutions in the six independent theories of Quartic Generalized Quasi-topological Gravity in four dimensions. Unlike in the static case, for rotating black holes we obtain distinct results for five out of the six theories. We construct approximate and numerical solutions to these equations, and study how physical properties of the solutions are modified, working to leading order in the coupling constant.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Everett Patterson, Robert B. Mann
Summary: Relativistic quantum metrology is the study of optimal measurement procedures in systems with quantum and relativistic components. In this study, we analyze thermal parameters in different spacetimes using Unruh-DeWitt detectors coupled to a massless scalar field. We consider both (2+1)-dimensional anti-de Sitter and BTZ black hole spacetimes and compute the Fisher information to identify characteristics and maximize precision.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Jiayue Yang, Robert B. Mann
Summary: Treating the horizon radius as an order parameter, the study investigates the dynamic behavior of black hole phase transitions using the free energy landscape model. The first investigation of the recently discovered multicriticality in black holes is carried out. By numerically solving the Smoluchowski equation, thermodynamic phase transitions and oscillatory phenomena are observed at black hole quadruple points in D = 4 Einstein gravity coupled to non-linear electrodynamics. The probability distribution of the final stationary state is found to be closely related to the structure of its off-shell Gibbs free energy.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Quantum Science & Technology
Ireneo James Membrere, Kensuke Gallock-Yoshimura, Laura J. Henderson, Robert B. Mann
Summary: The first investigation on tripartite entanglement harvesting near a black hole is conducted. In the static Banados-Teitelboim-Zanelli (BTZ) black hole spacetime, the authors find that it is possible to harvest tripartite entanglement in regions where harvesting of bipartite entanglement is impossible due to intense Hawking radiation. In these situations, the harvested entanglement is of the Greenberger-Horne-Zeilinger (GHZ) type.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Astronomy & Astrophysics
Moaathe Belhaj Ahmed, David Kubiznak, Robert B. Mann
Summary: An isolated critical point refers to a unique thermodynamic critical point in higher dimensions of Kth-order Lovelock gravity with hyperbolic black holes, achieved by fine-tuning Lovelock coupling constants. It represents the merging of two swallowtails and exhibits unconventional critical exponents. By applying a recent proposal for topological charge assignment to thermodynamic critical points, the isolated critical point is suggested to indicate the onset of a topological phase transition of a vortex-antivortex pair.
Article
Astronomy & Astrophysics
Dyuman Bhattacharya, Kensuke Gallock-Yoshimura, Laura J. Henderson, Robert B. Mann
Summary: We investigate the changes in initial entanglement of two initially entangled Unruh-DeWitt particle detectors after interacting with a quantum scalar field. Similar to separable detectors, entangled detectors can gain more entanglement from the field as long as they are weakly correlated at the beginning. Only degradation occurs for initially sufficiently entangled detectors. We then analyze the case of a gravitational shock wave spacetime and demonstrate that the shock wave can enhance the initial entanglement, even for greater detector separations than in Minkowski spacetime.
Article
Astronomy & Astrophysics
Jerry Wu, Robert B. Mann
Summary: We demonstrate that black holes in Lovelock gravity with order N≥4 can exhibit multicritical phase behavior. We provide explicit examples of quadruple points in d=10 fourth-order Lovelock gravity and quintuple points in d=14 sixth-order Lovelock gravity. We also show that multicriticality can be realized for uncharged, nonrotating black holes by introducing a new type of multicritical point between black holes and thermal radiation. Additionally, we discuss the methodology used and compare it to other black hole multicritical points in terms of the Gibbs phase rule.
Article
Astronomy & Astrophysics
Ahmed Shalabi, Laura J. Henderson, Robert B. Mann
Summary: The potential breakdown of the metric at high energy scales could suggest a fundamental minimal length scale. One approach to this minimum length scale is to construct a quantum field theory with a bandlimit on the field. We investigate the effects of implementing such a bandlimit on a field in a curved and compact spacetime, and how to detect it.
Article
Astronomy & Astrophysics
Manar Naeem, Kensuke Gallock-Yoshimura, Robert B. Mann
Summary: We studied the mutual information harvesting protocol for two uniformly accelerated particle detectors. Our numerical calculations demonstrate that, although a single detector behaves as if it is in a thermal bath, the quantum mutual information between two accelerating detectors differs from that of two inertial detectors in a thermal bath. This discrepancy arises because the Wightman function along the trajectory of a single uniformly accelerating detector is the same as that of a detector in a thermal bath, but a pair of detectors in the respective cases have different Wightman functions.
Article
Astronomy & Astrophysics
Brayden R. Hull, Robert B. Mann
Summary: We demonstrate the existence of asymptotically de Sitter black holes of negative mass in Lovelock gravity. These black holes have horizon geometries with nonconstant curvature and are known as exotic black holes. We specifically study the case of Gauss-Bonnet gravity. We discuss the impact of transverse space geometry on the existence of black holes for both positive and negative mass solutions and provide closed form bounds for geometric parameters.
Article
Astronomy & Astrophysics
Amjad Ashoorioon, Mohammad Bagher Jahani Poshteh, Robert B. Mann
Summary: Accelerating black holes, connected to cosmic strings, could evolve into supermassive black holes. However, the acceleration should be small in order for them to participate in structure formation and reside at the center of galaxies. Although this slow acceleration does not significantly change the shadow or image position in gravitational lensing, it does significantly affect the time delay associated with these images.
