(Gravitational) Vacuum Cherenkov Radiation
Departamento de Física, Universidade Federal do Maranhão (UFMA), Campus Universitário do Bacanga, São Luís 65080-805, Brazil
Symmetry 2018, 10(10), 424; https://doi.org/10.3390/sym10100424
Received: 1 September 2018 / Revised: 15 September 2018 / Accepted: 15 September 2018 / Published: 21 September 2018
(This article belongs to the Special Issue Broken Symmetry in Curved Spacetime and Gravity)
This work reviews our current understanding of Cherenkov-type processes in vacuum that may occur due to a possible violation of Lorentz invariance. The description of Lorentz violation is based on the Standard Model Extension (SME). To get an overview as general as possible, the most important findings for vacuum Cherenkov radiation in Minkowski spacetime are discussed. After doing so, special emphasis is put on gravitational Cherenkov radiation. For a better understanding, the essential properties of the gravitational SME are recalled in this context. The common grounds and differences of vacuum Cherenkov radiation in Minkowski spacetime and in the gravity sector are emphasized.
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Keywords:
Lorentz and CPT violation; standard model extension; vacuum Cherenkov radiation; modified gravity; experimental tests of gravity; gravitational waves
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Schreck, M. (Gravitational) Vacuum Cherenkov Radiation. Symmetry 2018, 10, 424.
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