An Investigation of Equivalence between the Bulk-based and the Brane-based Approaches for Anisotropic Models

TL;DR

This paper explores the fundamental equivalence between bulk-based and brane-based approaches in anisotropic brane-world models, providing a general formalism and explicit solutions that connect the two perspectives.

Contribution

It develops a general formalism demonstrating the equivalence of bulk-based and brane-based approaches for anisotropic models in brane-world scenarios.

Findings

Derived brane-based metric from a general anisotropic bulk metric.

Established the formalism for equivalence between the two approaches.

Provided explicit solutions for anisotropic bulk-based models.

Abstract

We investigate the relation between the brane-based and the bulk-based approaches for anisotropic case in brane-world models. In the brane-based approach, the brane is chosen to be fixed on a coordinate system, whereas in the bulk-based approach it is no longer static as it moves along the extra dimension. It was shown that these two approaches are basicly equal for specific models Mukohyama et al., Bowcock et al. In this paper, it is aimed to get general formalism of the equivalence obtained in Mukohyama et al. We found that calculations driven by a general anisotropic bulk-based metric yield a brane-based metric in Gaussian Normal Coordinates by conserving spatial anisotropy. We also derive solutions for an anisotropic bulk-based model and apply to get corresponding brane-based metric of the model.