Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Nilay Kundu"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-56 (2024)
Abstract We study the conformal invariance of inflationary non-Gaussianities associated with scalar fluctuations in a non-Bunch-Davies initial state, known as the α-vacuum, in single-field slow-roll inflation. The α-vacuum is a one-parameter family
Externí odkaz:
https://doaj.org/article/44bceafa60684b6c9e86fbfc18cddf5c
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-67 (2023)
Abstract We construct an entropy current and establish a local version of the classical second law of thermodynamics for dynamical black holes in Chern-Simons (CS) theories of gravity. We work in a chosen set of Gaussian null coordinates and assume t
Externí odkaz:
https://doaj.org/article/ca2b0793d9cf446bb5eccb7d66af5b55
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-37 (2023)
Abstract De-Sitter(dS) space allows for a generalized class of vacua, known as α–vacua, described by some parameters. The Bunch-Davies (BD) vacuum is a point in this parameter space. The cosmological correlation function in BD vacuum in four dimen
Externí odkaz:
https://doaj.org/article/9ba72d1fda3e462e99c8634e078388c3
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-56 (2022)
Abstract This work extends the proof of a local version of the linearized second law involving an entropy current with non-negative divergence by including the arbitrary non-minimal coupling of scalar and U(1) gauge fields with gravity. In recent wor
Externí odkaz:
https://doaj.org/article/a77c8846b4e64287b5db72891a469f42
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 10, Pp 1-29 (2022)
Abstract We consider diffeomorphism invariant theories of gravity with arbitrary higher derivative terms in the Lagrangian as corrections to the leading two derivative theory of Einstein’s general relativity. We construct a proof of the zeroth law
Externí odkaz:
https://doaj.org/article/801aa0c0b879464ea7d3f285a53f1e4e
Autor:
Sayantani Bhattacharyya, Prateksh Dhivakar, Anirban Dinda, Nilay Kundu, Milan Patra, Shuvayu Roy
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-60 (2021)
Abstract We construct a proof of the second law of thermodynamics in an arbitrary diffeomorphism invariant theory of gravity working within the approximation of linearized dynamical fluctuations around stationary black holes. We achieve this by estab
Externí odkaz:
https://doaj.org/article/9cfb5fa8b58d4f10a439e21b9170fdf5
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-64 (2020)
Abstract We propose an entropy current for dynamical black holes in a theory with arbitrary four derivative corrections to Einstein’s gravity, linearized around a stationary black hole. The Einstein-Gauss-Bonnet theory is a special case of the clas
Externí odkaz:
https://doaj.org/article/d77d71a4b93c435297f82beda3f267a8
Autor:
Arpan Bhattacharyya, Pawel Caputa, Sumit R. Das, Nilay Kundu, Masamichi Miyaji, Tadashi Takayanagi
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-26 (2018)
Abstract In this work, we formulate a path-integral optimization for two dimensional conformal field theories perturbed by relevant operators. We present several evidences how this optimization mechanism works, based on calculations in free field the
Externí odkaz:
https://doaj.org/article/8712e1e8047045e8a971778d5f9bfda7
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-56 (2017)
Abstract We propose an optimization procedure for Euclidean path-integrals that evaluate CFT wave functionals in arbitrary dimensions. The optimization is performed by minimizing certain functional, which can be interpreted as a measure of computatio
Externí odkaz:
https://doaj.org/article/c3e9520db5a54dbf9d67691906f998d5
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-52 (2017)
Abstract Developing on a recent work on localized bubbles of ordinary relativistic fluids, we study the comparatively richer leading order surface physics of relativistic superfluids, coupled to an arbitrary stationary background metric and gauge fie
Externí odkaz:
https://doaj.org/article/f2f6484eec704aa0981390e9447bd9fa