Degenerate and critical domain walls and accelerating universes driven by bulk particles

TL;DR

This paper investigates a model where our universe is a 3D domain wall in 5D space, exploring new soliton solutions and how bulk particle collisions can drive cosmic acceleration.

Contribution

It introduces a broader class of soliton solutions in a 3D domain wall universe model and examines their impact on cosmic acceleration caused by bulk particle interactions.

Findings

Existence of richer soliton solutions in the domain wall model

Bulk particle collisions can induce universe acceleration

Certain solutions are fundamental during expansion

Abstract

We consider a scenario where our universe is taken as a three-dimensional domain wall embedded in a five-dimensional Minkowski space-time, as originally proposed by Brito and collaborators [1]. We explore the existence of a richer class of soliton solutions and their consequences for the acceleration of the universe driven by collisions of bulk particle excitations with the walls. In particular it is shown that some of these solutions should play a fundamental role throughout the expansion process.