Domain wall cosmology and multiple accelerations

TL;DR

This paper classifies the cosmological behaviors of domain walls in spacetimes with various parameters, revealing solutions that exhibit early inflation followed by late-time acceleration.

Contribution

It provides a comprehensive classification of domain wall cosmologies considering different bulk parameters and identifies solutions with multiple acceleration phases.

Findings

Existence of solutions with early inflation and late-time acceleration.

Classification of domain wall behaviors based on parameters.

Analysis of junctions between different AdS spacetimes.

Abstract

We classify the cosmological behaviors of the domain wall under junctions between two spacetimes in terms of various parameters: cosmological constants of bulk spacetime, a tension of a domain wall, and mass parameters of the black hole-type metric. Especially, we consider the false-true vacuum type junctions and the domain wall connecting between an inner AdS space and an outer AdS Reissner-Nordstr${\rm \ddot{o}}$m black hole. We find that there exist a solution to the junction equations with an inflation at earlier times and an accelerating expansion at later times.