Duality and Strings, Space and Time

Details Duality and Strings, Space and Time Duality and Strings, Space and Time

1999-11-11

arxiv.org/abs/hep-th/9911080v1

Physics

High Energy Physics

High Energy Physics - Theory

Contribution to Proceedings of "Mathematical Sciences beyond the Second Millenium" held at the Center for Advanced Mathematica

Scientific paper

Duality symmetries in M--theory and string theory are reviewed, with particular emphasis on the way in which string winding modes and brane wrapping modes can lead to new spatial dimensions. Brane world-volumes wrapping around Lorentzian tori can give rise to extra time dimensions and in this way dualities can change the number of time dimensions as well as the number of space dimensions. This suggests that brane wrapping modes and spacetime momenta should be on an equal footing and M--theory should not be formulated in a spacetime of definite dimension or signature.

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