Decoherence in an accelerated universe

TL;DR

This paper investigates how quantum decoherence occurs in an accelerated universe through interactions with scalar fields and vacuum fluctuations, using a third quantization approach within a multiverse context.

Contribution

It introduces a third quantization formalism to analyze decoherence between universe branches caused by vacuum fluctuations and multiverse interactions.

Findings

Decoherence is driven by scalar field interactions and vacuum fluctuations.

The formalism provides a new way to quantify decoherence in multiverse scenarios.

Results suggest decoherence influences the classical appearance of the universe.

Abstract

In this paper we study the decoherence processes of the semiclassical branches of an accelerated universe due to their interaction with a scalar field with given mass. We use a third quantization formalism to analyze the decoherence between two branches of a parent universe caused by their interaction with the vaccum fluctuations of the space-time, and with other parent unverses in a multiverse scenario.