Instability of Tachyon Supertube in Type IIA Godel Spacetime
High Energy Physics - Theory
2009-11-10 v4
Abstract
We study the tachyon supertube probes in a type IIA supergravity background which is a stringy-like G\"odel spacetime and contains closed timelike curve. In the case of small value of , which is a parameter of the background, we use the Minahan-Zwiebach tachyon action to obtain a single regular tube solution and argue that the tube is a BPS D2-brane. However, we find that the fluctuation around the tube configuration has a negative-energy mode. This means that the tachyon supertube, despite being a BPS configuration, develops an instability in the pathological spacetime with closed timelike curve which violates the causality.
Keywords
Cite
@article{arxiv.hep-th/0412096,
title = {Instability of Tachyon Supertube in Type IIA Godel Spacetime},
author = {Wung-Hong Huang},
journal= {arXiv preprint arXiv:hep-th/0412096},
year = {2009}
}
Comments
Latex 12 pages, add more discussions in last section