No birefringence in Einstein's gravity

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dc.creatorMohanty, S.
dc.creatorPrasanna, A. R.
dc.date1995-05-22
dc.date.accessioned2026-07-07T02:19:48Z
dc.date.available2026-07-07T02:19:48Z
dc.descriptionEinstein's theory predicts that, massive test particles with non-zero spin or angular momentum, in an external gravitation field, follow geodesics which depend upon the orientation of the spin-angular momentum . It has been claimed that such an effect also holds for photons i.e. photons with different helicities follow different geodesics in the gravitational field of a rotating body and would give rise to a polarisation dependent deflection of light passing in the vicinity of the sun or a polarisation dependent time delay of pulsar signals . We show here that contrary to earlier claims , in Einstein's gravity there is no birefringence and photons follow null geodesics irrespective of polarisation. Thus if gravitational birefringence is ever observed experimentally it would be a signal of new physics beyond Einstein's gravity
dc.descriptionlatex file no figures
dc.identifierhttps://arxiv.org/abs/astro-ph/9505100
dc.identifierhttp://arxiv.org/abs/astro-ph/9505100
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/10010
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleNo birefringence in Einstein's gravity
dc.typetext

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