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arXiv · hep-th/0610055

Non-Abelian coset string backgrounds from asymptotic and initial data

P. M. Petropoulos·K. Sfetsos
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Abstract

We describe hierarchies of exact string backgrounds obtained as non-Abelian cosets of orthogonal groups and having a space--time realization in terms of gauged WZW models. For each member in these hierarchies, the target-space backgrounds are generated by the ``boundary'' backgrounds of the next member. We explicitly demonstrate that this property holds to all orders in $α'$. It is a consequence of the existence of an integrable marginal operator build on, generically, non-Abelian parafermion bilinears. These are dressed with the dilaton supported by the extra radial dimension, whose asymptotic value defines the boundary. Depending on the hierarchy, this boundary can be time-like or space-like with, in the latter case, potential cosmological applications.

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P. M. Petropoulos, K. Sfetsos. 2006-10-04. Non-Abelian coset string backgrounds from asymptotic and initial data. https://doi.org/10.1088/1126-6708%2F2007%2F04%2F033

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