Instability of tachyon supertube in type IIA Gödel spacetime

Wung Hong Huang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We study the tachyon supertube probes in a type IIA supergravity background which is a stringy-like Gödel spacetime and contains closed timelike curve. In the case of small value of f, 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.

Original languageEnglish
Pages (from-to)266-272
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 2005 Jun 2

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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