Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-01-30
Phys.Lett. B400 (1997) 97-100
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, LaTeX. Final version, to appear in Phys. Lett.B. (some typos corrected)
Scientific paper
10.1016/S0370-2693(97)00332-8
It is a well known fact that the classical (``Buscher'') transformations of T-duality do receive, in general, quantum corrections. It is interesting to check whether classical T-duality can be exact as a quantum symmetry. The natural starting point is a $\sigma$-model with N=4 world sheet supersymmetry. Remarkably, we find that (owing to the fact that N=4 models with torsion are not off-shell finite as quantum theories),the T-duality transformations for these models get in general quantum corrections, with the only known exception of warped products of flat submanifolds or orbifolds thereof with other geometries.
Alvarez Enrique
Borlaf Javier
León J. H.
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