Localizing gravity on exotic thick 3-branes

TL;DR

This paper investigates how gravity can be localized on complex thick brane structures, including new asymmetric solutions connecting different AdS_5 spacetimes, expanding the understanding of gravity confinement in higher-dimensional models.

Contribution

The authors introduce a novel asymmetric thick brane solution derived from fake supergravity, demonstrating gravity localization on branes connecting distinct AdS_5 regions.

Findings

Gravity can be confined on asymmetric thick branes.

New solutions interpolate between different AdS_5 spacetimes.

The approach uses a fake supergravity superpotential.

Abstract

We consider localization of gravity on thick branes with a non trivial structure. Double walls that generalize the thick Randall-Sundrum solution, and asymmetric walls that arise from a Z_2-symmetric scalar potential, are considered. We present a new asymmetric solution: a thick brane interpolating between two AdS_5 spacetimes with different cosmological constants, which can be derived from a ``fake supergravity'' superpotential, and show that it is possible to confine gravity on such branes.