Article
Astronomy & Astrophysics
Emil T. Akhmedov, Kirill V. Bazarov
Summary: In this paper, we study a quantum real massive scalar field in the de Sitter-Schwarzschild spacetime background. To make analytical progress, we focus on the two-dimensional case, assuming that the situation in four dimensions will be similar conceptually. We assume the quantum field to be in a thermal state, described by the Planckian distribution for the exact modes in the given geometry. We approximately calculate the expectation value of the stress-energy tensor near the cosmological and black hole horizons. It is found that the geometry is strongly modified by the quantum fluctuations of the matter fields, due to the backreaction from quantum fields with a generic temperature.
Article
Astronomy & Astrophysics
Abhishek Mathur, Sumati Surya, X. Nomaan
Summary: In this study, we calculate the manifestly covariant entanglement entropy S for a massive and massless minimally coupled free Gaussian scalar field on the de Sitter horizon and Schwarzschild de Sitter horizons, respectively. The calculations show that S for the mixed state is independent of the effective mass and matches the results obtained by Higuchi and Yamamoto. By using a cut-off in the angular modes, it is found that S is proportional to the area of the respective horizons.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Astronomy & Astrophysics
R. A. Konoplya, A. Zhidenko
Summary: The study reveals stable circular orbits in D-dimensional asymptotically anti-de Sitter black holes, unlike the flat case, indicating the presence of stable orbits for any higher curvature Lovelock corrections, with a universal scaling relationship with temperature.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Physics, Particles & Fields
Guangzhou Guo, Peng Wang, Houwen Wu, Haitang Yang
Summary: This paper investigates the spontaneous scalarization of asymptotically anti-de Sitter charged black holes in a specific model with non-minimal coupling, discussing the domain of existence, stability, and phase structure for both RNAdS and scalarized black hole solutions. In a micro-canonical ensemble, scalarized solutions are thermodynamically favored, but there are richer phase transitions in a canonical ensemble, including a reentrant phase transition involving RNAdS and scalarized black holes.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Kai Lin
Summary: This paper explores the vibrations of quasinormal modes (QNMs) in rotating cylindrical black hole spacetime with a surrounding thin shell. The presence of the thin shell causes a piecewise metric and discontinuous potential function in the black hole spacetime beyond the horizon. Two methods, the matrix method and generalized Horowitz-Hubeny method, are proposed to solve the QNM equation with the discontinuous potential function. It is found that the thin shell can reduce the QNM frequency and alleviate the amplitude decay rate of the black hole.
Article
Astronomy & Astrophysics
Sanam Azarnia, Reza Fareghbal
Summary: In this study, we used the quantum extremal island method to investigate the information paradox in three-dimensional Kerr-de Sitter spacetimes. By coupling an auxiliary flat bath system to the spacetime and measuring the entropy of Hawking radiation in the weak gravity asymptotic regions, we found that adding island regions to the entanglement wedge of the radiation leads to the Page curve. We also determined the location of the quantum extremal surface outside the cosmological horizon and calculated the scrambling time.
Article
Physics, Particles & Fields
Davide Astesiano, S. L. Cacciatori
Summary: This study presents a new non BPS solution in N = 2 D = 4 gauged supergravity theory, which exhibits perfectly symmetric geometry and satisfies the attractor mechanism.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
J. Ovalle, E. Contreras, Z. Stuchlik
Summary: The research indicates that the cosmological constant is deformed near a black hole, leading to a reexamination of the black hole solution and the proposal of a new, simpler and more geometrically rich solution. A detailed study of the new black hole solution was carried out, showing the impact of rotation on the curvature, and a conjecture was made regarding its possible implications on alternative theories.
Article
Astronomy & Astrophysics
Cheng-Yong Zhang, Peng Liu, Yun-Qi Liu, Chao Niu, Bin Wang
Summary: The study focuses on the fully nonlinear dynamics of spherically symmetric black hole spontaneous scalarization in Einstein-Maxwell-scalar theory. It is found that by adjusting the coupling function and black hole charge, the development and stabilization of hairy black holes can be influenced.
Article
Astronomy & Astrophysics
Aaron Poole, Kostas Skenderis, Marika Taylor
Summary: In this paper, we discuss the definition of conserved quantities in asymptotically locally de Sitter spacetimes. We introduce the analog of holographic charges at future and past infinity and at other Cauchy surfaces, and explain the characteristics and changes of these charges.
Article
Physics, Particles & Fields
Kai Lin
Summary: This work discusses black hole thermodynamics in weak dynamical Anti-de Sitter spacetime, deriving local entropy balance equations and the principle of minimum entropy generation. Irreversible effects in nonequilibrium thermodynamics are studied using the Onsager reciprocal relation.
ADVANCES IN HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
D. Guerrero-Dominguez, P. Talavera
Summary: In this paper, we investigate two aspects of a black hole immersed in the Schwarzschild-de Sitter spacetime. Firstly, we discover a hidden conformal symmetry in the equation of motion for a massless scalar particle near the black hole horizon, when the two horizons satisfy a quadratic relation. Secondly, we present the leading quantum corrections to the entropy at large time in the semiclassical limit.
Article
Astronomy & Astrophysics
M. Salti, O. Aydogdu, K. Sogut
Summary: This study mainly discusses the features of the PAdS black hole solution and its application as a stable configuration for dark energy stars. Through mathematical calculations and graphical analyses, important physical characteristics of the PAdS black hole are investigated.
GENERAL RELATIVITY AND GRAVITATION
(2021)
Article
Astronomy & Astrophysics
Joao P. B. Brito, Rafael P. Bernar, Luis C. B. Crispino
Summary: In this study, we investigate the scalar radiation emitted by a source orbiting a Schwarzschild-anti-de Sitter black hole in circular geodesics. We compare the emitted power with that in other spacetimes and find different patterns of enhancement depending on the multipole modes.
Article
Astronomy & Astrophysics
M. Cveti, M. M. Stetsko
Summary: The study examines separability of the Dirac equation in the background of STU black hole solutions, finding that the introduction of a specific torsion term ensures separability. Additional research is needed to understand the properties and coupling of the torsion to fermionic fields.
Article
Physics, Particles & Fields
Sunjin Choi, Chiung Hwang
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Chiung Hwang, Sara Pasquetti, Matteo Sacchi
Summary: In this study, various 4d N = 1 theories with IR global symmetry enhancement are presented. These models have USp(2N) gauge group, 8 fundamental particles, one antisymmetric chiral, and varying numbers of gauge singlets. By using superpotential deformations involving the singlets, the UV symmetry is broken leading to SCFTs with E-6, SO(10), SO(9), SO(8) and F-4 IR global symmetry. The patterns of symmetry enhancement are explained using two arguments by Razamat, Sela and Zafrir, one involving the study of relations satisfied by marginal operators and the other relying on the existence of self-duality frames.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Sunjin Choi, Dongmin Gang, Nakwoo Kim
Summary: In this study, the large N sign oscillation of twisted indices for 3D theories on hyperbolic 3-manifolds obtained from M5-branes was investigated. The oscillatory behavior was understood holographically in terms of on-shell actions for Euclidean supergravity solutions, revealing a mathematical conjecture about the phase factor of a twisted Reidemeister-Ray-Singer torsion on hyperbolic 3-manifolds through the 3D-3D relation.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Chiung Hwang, Shlomo S. Razamat, Evyatar Sabag, Matteo Sacchi
Summary: By compactifying rank Q E-string theory on genus zero surfaces with various fluxes, interesting models with IR enhancements and duality properties can be constructed, such as the S-confinement duality. Furthermore, the theories discussed in four dimensions exhibit an SU(2)(ISO) symmetry that can naturally be identified with the isometry of the two-sphere.
Article
Physics, Particles & Fields
Lea E. Bottini, Chiung Hwang, Sara Pasquetti, Matteo Sacchi
Summary: In this paper, various 4d N = 1 dualities obtained by gluing two E[USp(2N)] blocks and adding fundamental matter are presented. The interpretation of E[USp(2N)] as a 4d S-wall is conjectured.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Lea E. Bottini, Chiung Hwang, Sara Pasquetti, Matteo Sacchi
Summary: This paper investigates whether a given infra-red duality between quantum field theories can be explained through other more elementary dualities. It focuses on theories with tensor matter and applies the idea of deconfinement, trading tensor matter for extra gauge nodes using elementary dualities. The paper discusses various examples in the context of 4d N = 1 supersymmetric theories related to elliptic hypergeometric integrals, including a new self-duality involving a quiver theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Chiung Hwang, Sungjoon Kim, Jaemo Park
Summary: We propose new 3d N = 2 Seiberg-like dualities by considering various monopole superpotential deformations on 3d N = 2 U(N-c) SQCDs with fundamental and adjoint matter fields. We provide nontrivial evidence of these new dualities by comparing the superconformal indices and performing the F-maximization.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Nikolay Bobev, Sunjin Choi, Junho Hong, Valentin Reys
Summary: We study the limit of the superconformal index of the ABJM theory on S-1 x S-2 with a small circle size compared to the sphere radius. We find closed form expressions for the leading terms in this limit, valid to all orders in the 1/N expansion. By rewriting the superconformal index, we establish a connection with the Bethe Ansatz Equations that govern the topologically twisted index. Applying the same technique, we extend these results to the superconformal index of 3d N = 4 SYM coupled to one adjoint and N-f fundamental hypermultiplets. The implications of our findings for holography and charged rotating black holes in AdS(4) are discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Sunjin Choi, Dongmin Gang, Hee-Cheol Kim
Summary: The study focuses on the IR phases of 3D R class theories associated with closed non-hyperbolic 3-manifolds. By analyzing Dehn fillings and gauging symmetries, it is found that simple topological properties of non-hyperbolic 3-manifolds can capture distinguished features of the IR phases. Additionally, it is observed that certain classes of atoroidal non-hyperbolic 3-manifolds always exhibit supersymmetry enhancement at low energy, flowing to rank-0 N = 4 SCFTs with trivial vacuum moduli space.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Riccardo Comi, Chiung Hwang, Fabio Marino, Sara Pasquetti, Matteo Sacchi
Summary: Recently, an algorithm for dualizing a theory into its mirror dual has been proposed for 3d N = 4 linear quivers and their 4d N = 1 uplift. This algorithm mimics the manipulations done at the level of the Type IIB brane setup and is based on genuine infra-red dualities. In this paper, the algorithm is generalized to the full duality group, resulting in dualities for 3d N = 3 theories and their 4d N = 1 counterpart. Additionally, three methods to study the RG flows triggered by possible VEVs appearing at the last step of the algorithm are proposed.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Sunjin Choi, Seok Kim, Jaewon Song
Summary: Studied the late-time behavior of the spectral form factor in four-dimensional N 1/4 4 super Yang-Mills theory and found that it is governed by the dominant multicut saddles that arise in the index matrix model, corresponding to the orbifolded Euclidean black holes in the AdS bulk.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Particles & Fields
Sunjin Choi, Saebyeok Jeong, Seok Kim, Eunwoo Lee
Summary: In this study, large N saddle points of the matrix model for the N = 4 Yang-Mills index dual to the BPS black holes in AdS(5) x S-5 are constructed in two different setups. Linear eigenvalue distributions and areal eigenvalue distributions are explored when the chemical potentials for the angular momenta are collinear and not collinear, respectively. Additionally, a class of multicut saddle points with nontrivial filling fractions is constructed, and the connection between the Bethe ansatz equation and the saddle point equation is discovered.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Chiung Hwang, Sara Pasquetti, Matteo Sacchi
Summary: We present an algorithm that dualizes linear quivers into their mirror dual in a piecemeal manner. The algorithm leverages two fundamental duality moves and the properties of the S-wall, all of which can be derived through iterative applications of Seiberg-like dualities.
Article
Astronomy & Astrophysics
Prarit Agarwal, Sunjin Choi, Joonho Kim, Seok Kim, June Nahmgoong
Summary: The research focuses on the index of 4d N = 4 Yang-Mills theory with U(N) gauge group, discussing the physics of dual Bogomolny-Prasad-Sommerfield black holes in AdS(5) x S-5. Numerical studies were conducted for N <= 6, showing that the entropy of the index matches well with the Bekenstein-Hawking entropy of the dual black holes. The data clarifies recent ideas and supports the analytic studies of these black holes from the index, including complex saddle points and oscillating signs.
