Dynamical Cobordisms in General Relativity and String Theory

Details Dynamical Cobordisms in General Relativity and String Theory Dynamical Cobordisms in General Relativity and String Theory

2010-09-16

arxiv.org/abs/1009.3277v2

JHEP 1102:022,2011

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 5 figures, LaTeX v2: reference added

Scientific paper

10.1007/JHEP02(2011)022

We describe a class of time-dependent solutions in string- or M-theory that are exact with respect to alpha-prime and curvature corrections and interpolate in physical space between regions in which the low energy physics is well-approximated by different string theories and string compactifications. The regions are connected by expanding "domain walls" but are not separated by causal horizons, and physical excitations can propagate between them. As specific examples we construct solutions that interpolate between oriented and unoriented string theories, and also between type II and heterotic theories. Our solutions can be weakly curved and under perturbative control everywhere and can asymptote to supersymmetric at late times.

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