Perturbative Instabilities on the Non-Commutative Torus, Morita Duality and Twisted Boundary Conditions

Details Perturbative Instabilities on the Non-Commutative Torus, Morita Duality and Twisted Boundary Conditions Perturbative Instabilities on the Non-Commutative Torus, Morita Duality and Twisted Boundary Conditions

2002-04-03

arxiv.org/abs/hep-th/0204037v1

JHEP 0205 (2002) 025

Physics

High Energy Physics

High Energy Physics - Theory

30 pages

Scientific paper

10.1088/1126-6708/2002/05/025

We study one-loop corrections in scalar and gauge field theories on the non-commutative torus. For rational theta, Morita equivalence allows these theories to be reformulated in terms of ordinary theories on a commutative torus with twisted boundary conditions. UV/IR mixing does not lead to singularities, however there can be large corrections. In particular, gauge theories show tachyonic instabilities for some of the modes. We discuss their relevance to spontaneous Z_N x Z_N symmetry breaking in the Morita dual SU(N) theory due to electric flux condensation.

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