Note on: "Domain wall universe in the Einstein--Born--Infeld theory" Phys. Lett. B 679 (2009) 160

TL;DR

This paper discusses the complex interaction between bulk and dynamic domain walls in Einstein-Born-Infeld theory, emphasizing that energy density, tension, and pressure vary with wall position, challenging previous assumptions.

Contribution

It highlights the variable nature of physical quantities on domain walls in Einstein-Born-Infeld theory, correcting a simplification made in earlier work.

Findings

Energy density, tension, and pressure depend on wall position.

The interaction with non-linear electromagnetism affects wall properties.

Previous models overlooked these variable dependencies.

Abstract

The interaction between bulk and dynamic domain wall in the presence of a linear / non-linear electromagnetism make energy density, tension and pressure on the wall all variables, depending on the wall position. In [1] this fact seems to be ignored.