String theory and the Classical Stability of Plane Waves

Details String theory and the Classical Stability of Plane Waves String theory and the Classical Stability of Plane Waves

2002-10-31

arxiv.org/abs/hep-th/0210308v2

Phys.Rev. D67 (2003) 045014

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, no figures; v2: very minor changes, references added, version accepted by PRD

Scientific paper

10.1103/PhysRevD.67.045014

The presence of fields with negative mass-squared typically leads to some form of instability in standard field theories. The observation that, at least in the light-cone gauge, strings propagating in plane wave spacetimes can have worldsheet scalars with such tachyon-like masses suggests that the supergravity background may itself be unstable. To address this issue, we perform a perturbative analysis around the type IIB vacuum plane wave, the solution which most obviously generates worldsheet scalars with negative mass-squared. We argue that this background is perturbatively stable.

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