Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection

Details Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection

2003-10-16

arxiv.org/abs/hep-th/0310158v2

JHEP 0401 (2004) 042

Physics

High Energy Physics

High Energy Physics - Theory

23 pages; v2: minor changes, references added, version to appear in JHEP

Scientific paper

10.1088/1126-6708/2004/01/042

We show that a Goedel-like deformation of AdS3 in heterotic string theory can be realized as an exact string background. Indeed this class of solutions is obtained as an exactly marginal deformation of the conformal field theory describing the NS5/F1 heterotic background. It can also be embedded in type II superstrings as a Kaluza-Klein reduction. We compute the spectrum of this model as well as the genus one modular invariant partition function. We discuss the issue of closed timelike curves and the propagation of long strings. They destabilize completely the background, although we construct another exact string background that may describe the result of the condensation of these long strings. Closed timelike curves are avoided in that case.

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