Gravity-induced birefringence within the framework of Poincare gauge theory

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dc.creatorPreuss, Oliver
dc.creatorSolanki, Sami K.
dc.creatorHaugan, M. P.
dc.creatorJordan, Stefan
dc.date2005-07-16
dc.date2005-07-28
dc.date.accessioned2026-07-07T06:17:58Z
dc.date.available2026-07-07T06:17:58Z
dc.descriptionGauge theories of gravity provide an elegant and promising extension of general relativity. In this paper we show that the Poincaré gauge theory exhibits gravity-induced birefringence under the assumption of a specific gauge invariant nonminimal coupling between torsion and Maxwell's field. Furthermore we give for the first time an explicit expression for the induced phaseshift between two orthogonal polarization modes within the Poincaré framework. Since such a phaseshift can lead to a depolarization of light emitted from an extended source this effect is, in principle, observable. We use white dwarf polarimetric data to constrain the essential coupling constant responsible for this effect.
dc.description12 pages, accepted for publication by Physical Review D
dc.identifierhttps://arxiv.org/abs/gr-qc/0507071
dc.identifierhttp://arxiv.org/abs/gr-qc/0507071
dc.identifierPhys.Rev. D72 (2005) 042001
dc.identifierdoi:10.1103/PhysRevD.72.042001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94574
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleGravity-induced birefringence within the framework of Poincare gauge theory
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