Non-perturbative time-dependent String Backgrounds and Axion-induced Optical Activity

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dc.creatorAlexandre, Jean
dc.creatorMavromatos, Nick E.
dc.creatorTanner, Dylan
dc.date2008-04-15
dc.date.accessioned2026-07-07T11:49:51Z
dc.date.available2026-07-07T11:49:51Z
dc.descriptionConformal invariance for bosonic strings in time-dependent backgrounds of graviton, dilaton and Kalb-Ramond field is obtained by imposing Weyl-beta functions to be homogeneous in time, to all orders in $α^{'}$. This construction is possible in any target space dimension, as a result of the non-trivial background configurations. The electromagnetic effects of the antisymmetric tensor field, when coupled to an Abelian (electromagnetic) gauge field, are discussed in the framework of a four-dimensional Minkowski Universe, for concreteness. Non-trivial optical activity is demonstrated, which constitutes a way of detecting string-inspired axion/dilaton effects in such models.
dc.description12 pages
dc.identifierhttps://arxiv.org/abs/0804.2353
dc.identifierhttp://arxiv.org/abs/0804.2353
dc.identifierPhys.Rev.D78:066001,2008
dc.identifierdoi:10.1103/PhysRevD.78.066001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203383
dc.subjectHigh Energy Physics - Theory
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNon-perturbative time-dependent String Backgrounds and Axion-induced Optical Activity
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