# Observational consequences of an interacting multiverse

## TL;DR

This paper explores how interactions between universes in a multiverse could lead to observable effects, such as a pre-inflationary stage, potentially detectable through cosmic microwave background measurements.

## Contribution

It introduces a third quantization formalism with an interacting scheme between universe wave functions, analyzing specific coupling effects and their observational implications.

## Key findings

- Interaction can induce a pre-inflationary stage in universe evolution
- Potential observable signatures in the cosmic microwave background
- Framework for testing multiverse interactions through cosmological data

## Abstract

The observability of the multiverse is at the very root of its physical significance as a scientific proposal. In this conference we present, within the third quantization formalism, an interacting scheme between the wave functions of different universes and analyze the effects of some particular values of the coupling function. One of the main consequences of the interaction between universes can be the appearance of a pre-inflationary stage in the evolution of the universes that might leave observable consequences in the properties of the CMB.