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T-Duality Can Fail | | Paul S. Aspinwall
; M. Ronen Plesser
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5 May 1999 | | Journal: | JHEP 9908 (1999) 001 | | Subject: | hep-th | | Abstract: | We show that T-duality can be broken by nonperturbative effects in string coupling. The T-duality in question is that of the 2-torus when the heterotic string is compactified on K3 x T2. This case is compared carefully to a situation where T-duality appears to work. A holonomy argument is presented to show that T-dualities (and general U-dualities) should only be expected for large amounts of supersymmetry. This breaking of R <-> 1/R symmetry raises some interesting questions in string theory which we discuss. Finally we discuss how the classical modular group of a 2-torus appears to be broken too. | | Source: | arXiv, hep-th/9905036 | | Services: | Forum | Review | PDF | Favorites | |
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