Renormalization-group flows and charge transmutation in string theory
نویسندگان
چکیده
We analyze the behaviour of heterotic squashed-Wess–Zumino–Witten backgrounds under renormalization-group flow. The flows we consider are driven by perturbation creating extra gauge fluxes. We show how the conformal point acts as an attractor from both the target-space and world-sheet points of view. We also address the question of instabilities created by the presence of closed time-like curves in string backgrounds. Partially supported by the EU under the contracts MEXT-CT-2003-509661,MRTN-CT-2004-005104 and MRTN-CT-2004-503369 Unité mixte du CNRS et de l’École Polytechnique, UMR 7644. Unité mixte du CNRS et de l’École Normale Supérieure, UMR 8549.
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