Time- and space-dependent backgrounds from non-supersymmetric strings. (English) Zbl 1034.81038
Summary: We investigate maximally symmetric backgrounds in non-supersymmetric string vacua with \(D\)-branes and \(O\)-planes localized in the compact space. We find a class of solutions with a perturbative string coupling constant in all regions of spacetime. Depending on the particular model, we find either a time evolution with a big-bang type singularity or a space-dependent background with generically orbifold singularities. We show that the result can be interpreted as a supersymmetric bulk with some symmetries broken by the boundaries. We also discuss an interesting connection to Lorentzian and Euclidian orbifolds.
MSC:
| 81T30 | String and superstring theories; other extended objects (e.g., branes) in quantum field theory |
| 83E30 | String and superstring theories in gravitational theory |
| 81T60 | Supersymmetric field theories in quantum mechanics |
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