One-loop graviton corrections to Maxwell’s equations

We compute the graviton induced corrections to Maxwell’s equations in the one-loop and weak field approximations. The corrected equations are analogous to the classical equations in anisotropic and inhomogeneous media. We analyze in particular the corrections to the dispersion relations. When the wa...

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Publicado: 2001
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v63_n8_p12_Dalvit
http://hdl.handle.net/20.500.12110/paper_15507998_v63_n8_p12_Dalvit
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v63_n8_p12_Dalvit2023-06-08T16:21:47Z One-loop graviton corrections to Maxwell’s equations We compute the graviton induced corrections to Maxwell’s equations in the one-loop and weak field approximations. The corrected equations are analogous to the classical equations in anisotropic and inhomogeneous media. We analyze in particular the corrections to the dispersion relations. When the wavelength of the electromagnetic field is much smaller than a typical length scale of the graviton two-point function, the speed of light depends on the direction of propagation and on the polarization of the radiation. In the opposite case, the speed of light may also depend on the energy of the electromagnetic radiation. We study in detail wave propagation in two special backgrounds: flat Robertson-Walker and static, spherically symmetric spacetimes. In the case of a flat Robertson-Walker gravitational background we find that the corrected electromagnetic field equations correspond to an isotropic medium with a time-dependent effective refractive index. For a static, spherically symmetric background the graviton fluctuations induce a vacuum structure which causes birefringence in the propagation of light. © 2001 The American Physical Society. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v63_n8_p12_Dalvit http://hdl.handle.net/20.500.12110/paper_15507998_v63_n8_p12_Dalvit
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We compute the graviton induced corrections to Maxwell’s equations in the one-loop and weak field approximations. The corrected equations are analogous to the classical equations in anisotropic and inhomogeneous media. We analyze in particular the corrections to the dispersion relations. When the wavelength of the electromagnetic field is much smaller than a typical length scale of the graviton two-point function, the speed of light depends on the direction of propagation and on the polarization of the radiation. In the opposite case, the speed of light may also depend on the energy of the electromagnetic radiation. We study in detail wave propagation in two special backgrounds: flat Robertson-Walker and static, spherically symmetric spacetimes. In the case of a flat Robertson-Walker gravitational background we find that the corrected electromagnetic field equations correspond to an isotropic medium with a time-dependent effective refractive index. For a static, spherically symmetric background the graviton fluctuations induce a vacuum structure which causes birefringence in the propagation of light. © 2001 The American Physical Society.
title One-loop graviton corrections to Maxwell’s equations
spellingShingle One-loop graviton corrections to Maxwell’s equations
title_short One-loop graviton corrections to Maxwell’s equations
title_full One-loop graviton corrections to Maxwell’s equations
title_fullStr One-loop graviton corrections to Maxwell’s equations
title_full_unstemmed One-loop graviton corrections to Maxwell’s equations
title_sort one-loop graviton corrections to maxwell’s equations
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v63_n8_p12_Dalvit
http://hdl.handle.net/20.500.12110/paper_15507998_v63_n8_p12_Dalvit
_version_ 1768542521969868800

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