The cosmological constant problem in codimension-two brane models

TL;DR

This paper explores the potential for a dynamic solution to the cosmological constant problem within six-dimensional Einstein-Maxwell models, emphasizing the unique features of codimension-two branes and the importance of early universe bulk cosmology.

Contribution

It highlights the significance of codimension-two branes and discusses the challenges of understanding early universe bulk dynamics for solving the cosmological constant problem.

Findings

Codimension-two branes have unique properties affecting cosmological constant solutions.

Understanding early universe bulk evolution is crucial for dynamical solutions.

The paper discusses theoretical aspects without providing a definitive solution.

Abstract

We discuss the possibility of a dynamical solution to the cosmological constant problem in the contaxt of six-dimensional Einstein-Maxwell theory. A definite answer requires an understanding of the full bulk cosmology in the early universe, in which the bulk has time-dependent size and shape. We comment on the special properties of codimension two as compared to higher codimensions.