Article
Physics, Particles & Fields
Elena Caceres, Rodrigo Castillo Vasquez, Alejandro Vilar Lopez
Summary: The study derives the holographic entanglement entropy functional for a gravitational theory up to cubic order in the Riemann tensor, showcasing the differences between minimal and non-minimal splittings. The results are applied to specific examples and show that causal wedge inclusion is respected for a wide range of values of the cubic coupling.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Scott Aaronson, Jason Pollack
Summary: According to the AdS/CFT correspondence, the geometries of certain spacetimes can be fully determined by the von Neumann entropies of quantum states on their boundaries. This research investigates the possibility of reconstructing geometries from entropies in polynomial time. The study shows that in the case of a single 1D boundary divided into N atomic regions, a graph model for the bulk can be constructed in linear time based on a list of entropies satisfying Strong Subadditivity.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
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
Physics, Particles & Fields
Gaurav Katoch, Swejyoti Mitra, Shubho R. Roy
Summary: This study extends our previous work on the complexity characteristics of Little String Theory (LST) using holography. By incorporating Lorentz violating deformations in a 2d field theory, the effects of Lorentz violation and nonlocality on quantum complexity are investigated. The study finds that these effects are intertwined in the UV divergence structure of quantum complexity.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Kaberi Goswami, K. Narayan
Summary: We study 4-dimensional Schwarzschild de Sitter black holes in the regime where the black hole mass is small compared with the de Sitter scale. Then the de Sitter temperature is very low compared with that of the black hole. We find that the entanglement entropy of radiation exhibits linear growth in time, indicative of the information paradox for the black hole. Self-consistently including an appropriate island emerging at late times near the black hole horizon leads to a reasonable Page curve. There are close parallels with flat space Schwarzschild black holes in the regime we consider.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Jaydeep Kumar Basak, Debarshi Basu, Vinay Malvimat, Himanshu Parihar, Gautam Sengupta
Summary: In this paper, we investigate the time evolution of reflected entropy and entanglement negativity for mixed state configurations in the radiation flux of moving mirrors using the AdS/BCFT duality. We show that the results obtained exactly agree with the corresponding holographic computations in the dual bulk AdS(3) geometry, and derive the analogues of the Page curves for these measures in the radiation flux of kink and escaping mirrors.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Alberto Guijosa, Yaithd D. Olivas, Juan F. Pedraza
Summary: This article explores the tension between two concepts in holography and proposes a solution with holographic rememorization. By introducing an infrared boundary action, the reduced density matrix can be fully identified. The article also discovers an interesting connection with AdS/BCFT and provides a simple example of equivalence in this context.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Alex Buchel
Summary: In this study, we analyze the dynamical fixed points of a strongly coupled gauge theory using holographic framework, and determine their perturbative stability or instability by computing the spectrum of the quasinormal modes. We also demonstrate that a stable fixed point can become unstable non-perturbatively, and discuss the role of entanglement entropy density as a litmus test for non-perturbative stability.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Arpan Bhattacharyya, S. Shajidul Haque, Eugene H. Kim
Summary: This research investigates circuit complexity to characterize chaos in multiparticle quantum systems and proposes a new diagnostic of quantum chaos based on complexity. Through explicit calculations on a toy model, the evolution of complexity is demonstrated as a possible diagnostic of chaos.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Seamus Fallows, Simon F. Ross
Summary: This study investigates the appearance of islands when a closed universe with gravity is entangled with a non-gravitating quantum system. The findings suggest that when the non-gravitating system has several components, the closed universe may be in a mixed state, unlike in simpler setups with a single quantum system where the closed universe was necessarily in a pure state. This mixed state's entropy is shown to be bounded by half of the coarse-grained entropy of the effective theory on the braneworld.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Salomeh Khoeini-Moghaddam, Farzad Omidi, Chandrima Paul
Summary: The study explores aspects of Hyperscaling Violating geometries at finite cutoff and zero temperature, focusing on holographic entanglement entropy, mutual information, and entanglement wedge cross section for strip-shaped entangling regions. Results show interesting features of HMI and EWCS compared to very small cutoff case, with HMI being a decreasing function and EWCS showing concavity changes. The location of phase transition and finite values are found to depend on the cutoff in this scenario.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Eyoab Bahiru
Summary: This article discusses the algebra of operators in the AdS-Rindler wedge, particularly in AdS(5)/CFT4. The algebra at the N = ∞ limit is explicitly constructed and its Type III1 nature is examined. The theory's 1/N corrections are considered, and a novel method of renormalizing the Ryu-Takayanagi surface area is utilized to renormalize several divergences, resulting in the algebra becoming Type II∞. This allows for the association of a density matrix with any state in the Hilbert space, leading to a von Neumann entropy.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Parul Jain, Niko Jokela, Matti Jarvinen, Subhash Mahapatra
Summary: This study examines various inequalities for entanglement wedge cross sections (EWCSs) as dual gravity probes for multiparty systems. Surprisingly, it is found that the EWCS is neither clearly monogamous nor polygamous for tripartite systems, but rather depends on the details and dimensionality of the gravity solutions. We propose weaker monogamy relations for dual entanglement measures, leading to a new lower bound on EWCS. The study is conducted on a variety of gravity backgrounds, including pure anti de Sitter spaces, anti de Sitter black branes, Dp-brane-induced backgrounds, and cigar geometries in generic dimensions.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Robert de Mello Koch, Garreth Kemp
Summary: The principle of the holography of information states that a copy of all the information available on a Cauchy slice is also available near the boundary. This redundancy in the theory is already present at low energy.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Venkatesa Chandrasekaran, Netta Engelhardt, Sebastian Fischetti, Sergio Hernandez-Cuenca
Summary: We have discovered a new on-shell replica wormhole and shown that it has lower action than the disconnected one. The stability of this replica wormhole depends on the signature of allowed perturbations. We have also introduced a new method for computing the on-shell action of replicated manifolds and found evidence that quantum corrections can sometimes stabilize this new saddle.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Mathematical
Kallol Sen, Masahito Yamazaki
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2020)
Article
Physics, Particles & Fields
Pietro Ferrero, Kausik Ghosh, Aninda Sinha, Ahmadullah Zahed
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Multidisciplinary
Parthiv Haldar, Aninda Sinha
Article
Physics, Particles & Fields
Subham Dutta Chowdhury, Parthiv Haldar, Kallol Sen
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Multidisciplinary
Aninda Sinha, Ahmadullah Zahed
Summary: This letter discusses a crossing symmetric dispersion relation for 2-2 scattering in quantum field theories, highlighting a geometric rotation in the complex z plane. The resulting three-channel crossing symmetric dispersion is obtained, along with derivations of known positivity conditions and new nonperturbative inequalities. The approach is used to locate the first massive string state and derive a generalized Froissart bound valid for all energies.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Andrei Parnachev, Kallol Sen
Summary: This study focuses on the eikonal phase associated with gravitational scattering in AdS spacetime between a highly energetic light particle and a heavy object. By using the WKB approximation and considering all orders in the impact parameter to the Schwarzschild radius ratio, the eikonal phase is computed. The research also explores the double scaling limit where both momentum and the AdS black hole become very large simultaneously.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Rajesh Gopakumar, Aninda Sinha, Ahmadullah Zahed
Summary: The study establishes a firm foundation for conformal field theories by utilizing manifestly crossing symmetric dispersion relations, resolving contact term ambiguities. The new approach employs locality constraints to replace the requirement of crossing symmetry in the usual fixed-t dispersion relation, showing that the sum rules based on two channel dispersion relations and the present dispersion relations are identical.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Parthiv Haldar, Aninda Sinha, Ahmadullah Zahed
Summary: An intriguing connection has been found between geometric function theory ingredients and the famous Bieberbach conjecture, as well as the non-perturbative crossing symmetric representation of 2-2 scattering amplitudes of identical scalars. By using dispersion relation and unitarity, inequalities analogous to those in the Bieberbach conjecture discussions are derived. New and strong bounds on certain Wilson coefficients ratio have been derived and shown to be valid in various theoretical contexts.
Article
Physics, Multidisciplinary
Anjishnu Bose, Aninda Sinha, Shaswat S. Tiwari
Summary: In this study, the allowed space of S-matrices on the Adler zeros' plane is examined using a numerical S-matrix bootstrap program for pion scattering. The study focuses on two physical quantities, the averaged total scattering cross-section, and the averaged entanglement power. The emerging linearity in the leading Regge trajectory is found to be correlated with a reduction in these quantities, and two potentially viable regions with decent agreement with low energy scattering lengths are identified.
Article
Physics, Particles & Fields
Prashanth Raman, Aninda Sinha
Summary: This paper investigates the correspondence between geometric function theory and quantum field theory, using the crossing symmetric dispersion relation to examine the connection between GFT, QFT, and EFTs. It summarizes existing mathematical bounds on Taylor coefficients of Typically Real functions and shows their usefulness in bounding Wilson coefficients in the context of 2-2 scattering. The study also explores two-sided bounds on Wilson coefficients in the fully crossing symmetric situation, and discusses numerical implementation of GFT constraints and comparisons with other literature findings.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Sudip Ghosh, Prashanth Raman, Aninda Sinha
Summary: This paper studies the 2-2 scattering problem in four spacetime dimensions using Celestial variables. The Celestial amplitudes are transformed into crossing symmetric partial waves using the crossing symmetric dispersion relation (CSDR). It is shown that these partial waves have spurious singularities in the complex Celestial variable and they need to be removed in local theories. The paper also introduces novel bounds on partial wave moments based on the locality constraints. Further analysis reveals the presence of a new kind of positivity in theories with spin-0 dominance. Finally, non-projective bounds on Wilson coefficients are derived using Geometric Function Theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Subham Dutta Chowdhury, Kausik Ghosh, Parthiv Haldar, Prashanth Raman, Aninda Sinha
Summary: We develop crossing symmetric dispersion relations for describing 2-2 scattering of identical external particles carrying spin. This enables us to import techniques from Geometric Function Theory and study two sided bounds on low energy Wilson coefficients. Consideration of the positivity of the absorptive part leads to an interesting connection with the recently conjectured weak low spin dominance.
Review
Physics, Multidisciplinary
Agnese Bissi, Aninda Sinha, Xinan Zhou
Summary: This review provides a pedagogical introduction to the analytic conformal bootstrap program and reviews analytic methods and explicit examples related to it.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Agnese Bissi, Aninda Sinha
Summary: This paper studies a crossing symmetric dispersion relation (CSDR) for CFT four point correlation with identical scalar operators, which is manifestly symmetric under the cross-ratios u, v interchange. It has several features in common with the CSDR for quantum field theories. The results provide insights into the expansion of correlation functions and the positivity of Taylor expansion coefficients, as well as universal predictions for specific ratios of these coefficients.
Article
Astronomy & Astrophysics
Aninda Sinha
Summary: This research demonstrates a fascinating connection between the crossing symmetric dispersion relation (CSDR) for 2-2 scattering and knot polynomials and q-deformed algebras. The dispersive kernel can be identified naturally in terms of the generating function for the Alexander polynomials corresponding to a specific knot in knot theory. Moreover, certain linear combinations of the low energy expansion coefficients of the amplitude can be bounded using knot invariants, and the pion S-matrix bootstrap data is in accordance with the obtained analytic bounds. The study also relates the q-deformed harmonic oscillator to the CSDR-knot picture, revealing that the scattering amplitude can be thought of as a q-averaged thermal two-point function involving the q-deformed harmonic oscillator, with the low temperature expansion coefficients precisely being the q-averaged Alexander knot polynomials.