## T-duality can fail

Publication
, Journal Article

Aspinwall, PS; Plesser, MR

Published in: Journal of High Energy Physics

1999

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 Scholars

## Published In

Journal of High Energy Physics

## ISSN

1029-8479

## Publication Date

1999

## Volume

3

## Issue

8

## Start / End Page

XI / 18

## Related Subject Headings

- Nuclear & Particles Physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0105 Mathematical Physics

### Citation

APA

Chicago

ICMJE

MLA

NLM

Aspinwall, P. S., & Plesser, M. R. (1999). T-duality can fail.

*Journal of High Energy Physics*,*3*(8), XI–18.Aspinwall, P. S., and M. R. Plesser. “T-duality can fail.”

*Journal of High Energy Physics*3, no. 8 (1999): XI–18.Aspinwall PS, Plesser MR. T-duality can fail. Journal of High Energy Physics. 1999;3(8):XI–18.

Aspinwall, P. S., and M. R. Plesser. “T-duality can fail.”

*Journal of High Energy Physics*, vol. 3, no. 8, 1999, pp. XI–18.Aspinwall PS, Plesser MR. T-duality can fail. Journal of High Energy Physics. 1999;3(8):XI–18.

## Published In

Journal of High Energy Physics

## ISSN

1029-8479

## Publication Date

1999

## Volume

3

## Issue

8

## Start / End Page

XI / 18

## Related Subject Headings

- Nuclear & Particles Physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0105 Mathematical Physics