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Theoretical Physycs Group at Scuola Normale Superiore
Piazza dei Cavalieri, 7
56100 Pisa PI - Italy
ph. +39 050 509203
ph. +39 050 509111

Emilian Dudas (École Polytechnique)

Electric Fields and Open Strings in Compact Spaces

We analyse open strings in the presence of electric fields in the internal space, T-dual to branes moving with constant velocities in the internal space. The direction of the electric field inside a two torus has to be quantised consistently, such that after T-duality D-brane motion in the internal torus is periodic, albeit with a periodicity that can be parametrically large in terms of internal radii. We present a quantum mechanical analysis of charged particles in a torus for both electric and magnetic internal fields. The results could be relevant for inflationary scenarios with branes.