Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Sudhakar Panda"'
Publikováno v:
Nuclear Physics B, Vol 1007, Iss , Pp 116678- (2024)
We consider the production of secondary gravity waves in Galileon inflation with an ultra-slow roll (USR) phase and show that the spectrum of scalar-induced gravitational waves (SIGWs) in this case is consistent with the recent NANOGrav 15-year data
Externí odkaz:
https://doaj.org/article/10a972b7fcc14b939d83ca6260b7161b
Publikováno v:
Physics Letters B, Vol 856, Iss , Pp 138925- (2024)
We investigate the explicit role of negative local non-Gaussianity, fNL, in suppressing the abundance of primordial black holes (PBHs) in the single-field model of Galileon inflation. PBH formation requires significantly enhancing the scalar power sp
Externí odkaz:
https://doaj.org/article/873c94e6ce83400980f0ed8fc041feb0
Autor:
Subhashish Banerjee, Sayantan Choudhury, Satyaki Chowdhury, Johannes Knaute, Sudhakar Panda, K. Shirish
Publikováno v:
Nuclear Physics B, Vol 996, Iss , Pp 116368- (2023)
In this article, we study the quantum field theoretic generalization of the Caldeira-Leggett model in general curved space-time considering interactions between two scalar fields in a classical gravitational background. The thermalization phenomena i
Externí odkaz:
https://doaj.org/article/193e3ba556b74d54b20c55fcb05b547b
Publikováno v:
Physics Letters B, Vol 845, Iss , Pp 138123- (2023)
Using the Effective Field Theory (EFT) framework of single field inflation, we investigate the possibility of the formation of Primordial Black Holes (PBHs) in the Slow Roll (SR) to Ultra Slow Roll (USR) sharp transition. We demonstrate that, due to
Externí odkaz:
https://doaj.org/article/865e098a3f27418aae2192a50c8f37e7
Autor:
Hardik Bohra, Sayantan Choudhury, Prashali Chauhan, Purnima Narayan, Sudhakar Panda, Abinash Swain
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 2, Pp 1-36 (2021)
Abstract In this paper, we explore the connection between the curvature of the background De Sitter space-time with the spectroscopic study of entanglement of two atoms. Our set up is in the context of an Open Quantum System (OQS), where the two atom
Externí odkaz:
https://doaj.org/article/4be406f1653b4ae59a5c31dae1091ea7
Autor:
Samim Akhtar, Sayantan Choudhury, Satyaki Chowdhury, Debopam Goswami, Sudhakar Panda, Abinash Swain
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 8, Pp 1-38 (2020)
Abstract In this work, our prime objective is to study non-locality and long range effect of two body correlation using quantum entanglement from various information theoretic measure in the static patch of de Sitter space using a two body Open Quant
Externí odkaz:
https://doaj.org/article/7eddf201e1cf4df3a43c11ef6afcad30
Autor:
Sayantan Choudhury, Sudhakar Panda
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 1, Pp 1-50 (2020)
Abstract In this work, we study the impact of quantum entanglement on the two-point correlation function and the associated primordial power spectrum of mean square vacuum fluctuation in a bipartite quantum field theoretic system. The field theory th
Externí odkaz:
https://doaj.org/article/b07c932f34e84d02a2a30c5d81bcaec1
Autor:
Sayantan Choudhury, Sudhakar Panda
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 1, Pp 1-36 (2018)
Abstract In this work, we study the quantum entanglement and compute entanglement entropy in de Sitter space for a bipartite quantum field theory driven by an axion originating from Type IIB string compactification on a Calabi–Yau three fold ($$\ma
Externí odkaz:
https://doaj.org/article/a265e89af8264756848a1ec43f2c836a
Autor:
Sayantan Choudhury, Satyaki Chowdhury, Nitin Gupta, Anurag Mishara, Sachin Panneer Selvam, Sudhakar Panda, Gabriel D. Pasquino, Chiranjeeb Singha, Abinash Swain
Publikováno v:
Symmetry, Vol 13, Iss 7, p 1301 (2021)
Recently, in various theoretical works, path-breaking progress has been made in recovering the well-known page curve of an evaporating black hole with quantum extremal islands, proposed to solve the long-standing black hole information loss problem r
Externí odkaz:
https://doaj.org/article/95563c5dccdb4ed1b78d6cc35f1ace42
Autor:
Sayantan Choudhury, Sudhakar Panda
Publikováno v:
Nuclear Physics B, Vol 943, Iss , Pp - (2019)
In this work, we study the phenomena of quantum entanglement by computing de Sitter entanglement entropy from von Neumann measure. For this purpose we consider a bipartite quantum field theoretic set up for axion field, previously derived from Type I
Externí odkaz:
https://doaj.org/article/3cdf7dfe55794a529497cfd3585b49a3