2019/07/15 by Fabian Kislat, Kislat, Fabian
Physics and Astronomy · Medicine · #Noncommutative and Quantum Gravity Theories #Advanced Differential Geometry Research #Radiation Therapy and Dosimetry
paper · pdf · doi:10.48550/arxiv.1907.06514
Astrophysical observations are a powerful tool to constrain effects of\nLorentz-invariance violation in the photon sector. Objects at high redshifts\nprovide the longest possible baselines, and gamma-ray telescopes allow us to\nobserve some of the highest energy photons. Observations include polarization\nmeasurements and time-of-flight measurements of transient or variable objects\nto constrain vacuum birefringence and dispersion. Observing multiple sources\ncovering the entire sky allows the extraction of constraints on anisotropy. In\nthis paper, I review methods and recent results on Lorentz- and CPT-invariance\nviolation constraints derived from astrophysical polarization measurements in\nthe framework of the Standard-Model Extension.\n