Negative Energies on the Brane

TL;DR

The paper investigates how phenomena like black holes and gravitational waves in higher-dimensional models can lead to negative energy densities on our universe, modeled as a brane in extra dimensions.

Contribution

It demonstrates that black holes, black strings, and bulk gravitational waves induce negative energy densities on the brane, revealing new effects in brane-world scenarios.

Findings

Black holes on the brane induce negative energy densities.

Black strings intersecting the brane contribute negative energies.

Bulk gravitational waves can produce negative energy effects.

Abstract

It has recently been proposed that our universe is a three-brane embedded in a higher dimensional spacetime. Here I show that black holes on the brane, black strings intersecting the brane, and gravitational waves propagating in the bulk induce an effective energy-momentum tensor on the brane that contains negative energy densities.