Vacuum decay in an interacting multiverse

TL;DR

This paper explores a multiverse model where interacting universes influence vacuum decay, potentially causing observable effects in the cosmic microwave background through collective behaviors during pre-inflationary phases.

Contribution

It introduces a novel multiverse interaction framework affecting vacuum nucleation and predicts observable imprints in cosmic microwave background radiation.

Findings

Interactions induce collective behavior in vacuum decay.

Possible pre-inflationary phase signatures in cosmic microwave background.

Distinct imprints could serve as evidence for multiverse interactions.

Abstract

We examine a new multiverse scenario in which the component universes interact. We focus our attention to the process of "true" vacuum nucleation in the false vacuum within one single element of the multiverse. It is shown that the interactions lead to a collective behaviour that might lead, under specific conditions, to a pre-inflationary phase and ensued distinguishable imprints in the comic microwave background radiation.