T-duality can fail

Journal Article

We show that T-duality can be broken by non-perturbative effects in string coupling. The T-duality in question is that of the 2-torus when the heterotic string is compactified on K3xT2. 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.

Duke Authors

Cited Authors

  • Aspinwall, PS; Plesser, MR

Published Date

  • 1999

Published In

Volume / Issue

  • 3 / 8

Start / End Page

  • XI - 18

International Standard Serial Number (ISSN)

  • 1029-8479