New models for asymmetric kinks and branes

TL;DR

This paper introduces new scalar field models capable of producing asymmetric kink and brane structures, which are stable and can generate diverse thick branes in extra-dimensional theories.

Contribution

The work presents novel scalar field models that allow for asymmetric solutions in flat and curved spacetime, expanding the variety of stable brane configurations in higher-dimensional theories.

Findings

Asymmetric scalar field solutions are linearly stable.

New asymmetric thick branes can be generated in warped geometries.

These structures are robust against small fluctuations.

Abstract

We investigate new models for scalar fields in flat and curved spacetime. We note that the global reflection symmetry of the potential that identify the scalar field model does not exclude the presence of internal asymmetries that give rise to asymmetric structures. Despite the asymmetry, the new structures are linearly stable and in the braneworld scenario with an extra dimension of infinite extend, they may generate new families of asymmetric thick branes that are robust against small fluctuations in the warped geometry.