de Sitter Space as a Glauber-Sudarshan State

TL;DR

This paper presents a novel perspective by identifying four-dimensional de Sitter space as a Glauber-Sudarshan coherent state within string theory, incorporating quantum corrections and temporal dynamics, which addresses longstanding cosmological issues.

Contribution

It demonstrates that de Sitter space can be realized as a coherent state in string theory, including quantum effects and time dependence, offering new insights into its entropy and energy properties.

Findings

De Sitter space can be modeled as a Glauber-Sudarshan coherent state.

Quantum corrections and time dependence are essential for this realization.

This approach addresses entropy and trans-Planckian censorship issues.

Abstract

Glauber-Sudarshan states, sometimes simply referred to as Glauber states, or alternatively as coherent and squeezed-coherent states, are interesting states in the configuration spaces of any quantum field theories, that closely resemble classical trajectories in space-time. In this paper, we identify four-dimensional de Sitter space as a coherent state over a supersymmetric Minkowski vacuum. Although such an identification is not new, what is new however is the claim that this is realizable in full string theory, but only in conjunction with temporally varying degrees of freedom and quantum corrections resulting from them. Furthermore, fluctuations over the de Sitter space is governed by a generalized graviton (and flux)-added coherent state, also known as the Agarwal-Tara state. The realization of de Sitter space as a state, and not as a vacuum, resolves many issues associated with its entropy, zero-point energy and trans-Planckian censorship, amongst other things.