2018
DOI: 10.3390/sym10110596
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Constraints on Lorentz Invariance Violation from Optical Polarimetry of Astrophysical Objects

Abstract: Theories of quantum gravity suggest that Lorentz invariance, the fundamental symmetry of the Theory of Relativity, may be broken at the Planck energy scale. While any deviation from conventional Physics must be minuscule in particular at attainable energies, this hypothesis motivates ever more sensitive tests of Lorentz symmetry. In the photon sector, astrophysical observations, in particular polarization measurements, are a very powerful tool because tiny deviations from Lorentz invariance will accumulate as … Show more

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Cited by 13 publications
(64 citation statements)
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“…[12] on dimension-four operators added to the Standard-Model lagrangian, whereas the effects we here consider would be described in field-theory in terms of dimension-five operators. However, describing photons within the SME the effects of dispersion would be combined with birefringence [13][14][15][16][17], which we here assume to be absent consistently with results obtained in frameworks alternative to the SME, such as those studied in Refs. [1,3,7] and references therein).…”
Section: Introductionsupporting
confidence: 79%
“…[12] on dimension-four operators added to the Standard-Model lagrangian, whereas the effects we here consider would be described in field-theory in terms of dimension-five operators. However, describing photons within the SME the effects of dispersion would be combined with birefringence [13][14][15][16][17], which we here assume to be absent consistently with results obtained in frameworks alternative to the SME, such as those studied in Refs. [1,3,7] and references therein).…”
Section: Introductionsupporting
confidence: 79%
“…In two recent papers, 3,4 we have combined more than 60 optical polarization measurements, both spectropolarimetric and broadband integrated measurements, to constrain individually all birefringent coefficients of mass dimensions d = 4 and d = 5. Constraints on the dimensionless coefficients k (4) (E)jm and k (4) (B)jm are <3 × 10 −34 , and the k (5) (V )jm are constrained to <7 × 10 −26 GeV −1 .…”
Section: Birefringencementioning
confidence: 99%
“…(V )jm , and c (6) (I)jm have been constrained using astrophysical polarization 3,4 and time-of-flight measurements, 5 and the k…”
Section: Introductionmentioning
confidence: 99%
“…2,4,6,9 However, since ground-based optical polarimetry and spectropolarimetry have smaller statistical and systematic errors than the more expensive and difficult x-ray/γ-ray polarimetry measurements, optical studies of AGN-the brightest, continuous, highly polarized, extragalactic optical sources-represent the most cost-effective approach to improve constraints on anisotropic SME coefficients today. 1,2,10 One can test CPT-odd birefringent SME coefficients with broadband polarimetry as follows. [1][2][3] The k (d) (V )jm SME coefficients predict a rotation of the linear polarization plane.…”
mentioning
confidence: 99%
“…Measuring a polarization fraction p ⋆ ± nσ p⋆ < p . A spherical-harmonic decomposition on the sky can then be used to combine sufficient numbers of line-of-sight constraints to bound all N (d) parameters at a given d. 2,10 These can also include lineof-sight constraints from spectropolarimetry, which can be about two or three orders of magnitude more sensitive than broadband polarimetry for d = 5. 2 Tests of CPT-even d = 4 SME coefficients are discussed in Ref.…”
mentioning
confidence: 99%