A supersymmetric D-brane Model of Space-Time Foam
Abstract
We present a supersymmetric model of space-time foam with two stacks of eight D8-branes with equal string tensions, separated by a single bulk dimension containing D0-brane particles that represent quantum fluctuations in the space-time foam. The ground state configuration with static D-branes has zero vacuum energy. However, gravitons and other closed-string states propagating through the bulk may interact with the D0-particles, causing them to recoil and the vacuum energy to become non zero. This provides a possible origin of dark energy. Recoil also distorts the background metric felt by energetic massless string states, which travel at less than the usual (low-energy) velocity of light. On the other hand, the propagation of chiral matter anchored on the D8 branes is not affected by such space-time foam effects.
Cite
@article{arxiv.gr-qc/0405066,
title = {A supersymmetric D-brane Model of Space-Time Foam},
author = {John Ellis and Nikolaos E. Mavromatos and Michael Westmuckett},
journal= {arXiv preprint arXiv:gr-qc/0405066},
year = {2009}
}
Comments
33 pages, latex, five figures