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Thermalization in Quenched Open Quantum Cosmology by Banerjee, Subhashish; Choudhury, Sayantan; Chowdhury, Satyaki; Knaute, Johannes; Panda, Sudhakar; Shirish, K. is a scholarly article available to read on EtoBox.

What is Thermalization in Quenched Open Quantum Cosmology about?

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 is then studied from the obtained de Sitter solution using quantum quench from one scalar field model obtained from path integrated effective action. We consider an instantaneous quench in the time-dependent mass protocol of the field of our interest. We find that the dynamics of the field post-quench can be described in terms of the state of the generalized Calabrese-Cardy (gCC) form and computed the different types of two-point correlation functions in this context. We explicitly found the conserved charges of $W_{\infty}$ algebra that represents the gCC state after a quench in de Sitter space and found it to be significantly different from the flat space-time results. We extend our study for the different two-point correlation functions not only considering the pre-quench state as the ground state, but also a squeezed state. We found that irrespective of the pre-quench state, the post quench state can be written in terms of the gCC st

Author

Banerjee, Subhashish; Choudhury, Sayantan; Chowdhury, Satyaki; Knaute, Johannes; Panda, Sudhakar; Shirish, K.

Published

2021

Language

EN