Relaxation of the cosmological constant in a movable brane world

TL;DR

This paper provides numerical evidence that a domain wall in a varying vacuum energy background can move towards regions of lower Hubble parameter, potentially reducing the effective cosmological constant.

Contribution

It demonstrates, through numerical analysis, that domain walls can dynamically relax the cosmological constant in a brane world scenario.

Findings

Domain walls acquire velocity towards decreasing Hubble regions.

Potential partial relaxation of the cosmological constant.

Numerical evidence supports dynamic relaxation mechanisms.

Abstract

We present numerical evidence that a domain wall in a background with varying vacuum energy density acquires velocity in the direction of decreasing Hubble parameter. This should lead to at least a partial relaxation of the cosmological constant on the wall.