Inflation in a Web

TL;DR

This paper explores a cosmological model where a web-like structure of inflationary branches leads to a multiverse, with potential observable implications for our universe, based on the formation of domain wall networks.

Contribution

It introduces a novel scenario of a web-structured inflationary field space resulting in a multiverse separated by domain walls, with discussion on observational prospects.

Findings

Multiverse formation via web-like inflationary branches

Potential observational signatures of domain wall networks

Theoretical framework connecting inflationary web to multiverse

Abstract

In a given path with multiple branches, in principle, it can be expected that there are some fork points, where one branch is bifurcated into different branches, or various branches converge into one or several branches. In this paper, it is showed that if there is a web formed by such branches in a given field space, in which each branch can be responsible for a period of slow roll inflation, a multiverse separated by domain wall network will come into being, some of which might corresponds to our observable universe. We discuss this scenario and show possible observations of a given observer at late time.