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Universe 2018, 4(8), 84;

Gravitational Waves in Einstein-Æther Theory and Generalized TeVeS Theory after GW170817

School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
Talk given by this author on the conference of International Conference on Quantum Gravity, SUSTech, Shenzhen, China, 26–28 March 2018.
Author to whom correspondence should be addressed.
Received: 27 June 2018 / Revised: 27 July 2018 / Accepted: 30 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Gravity, Black Holes and Cosmology XXI)
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In this paper , the polarization contents of Einstein-æther theory and the generalized TeVeS theory are studied. The Einstein-æther theory has five polarizations, while the generalized TeVeS theory has six. In particular, transverse and longitudinal breathing polarization are mixed. The possibility of using pulsar timing arrays to detect the extra polarizations in Einstein-æther theory was also investigated. The analysis showed that different polarizations cannot be easily distinguished by using pulsar timing arrays in this theory. For generalized TeVeS theory, one of the propagating modes travels much faster than the speed of light due to the speed bound set by GW170817. In some parameter subspaces, the strong coupling does not take place, so this theory is excluded. View Full-Text
Keywords: gravitational waves; local Lorentz violation; speed of light gravitational waves; local Lorentz violation; speed of light

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Hou, S.; Gong, Y. Gravitational Waves in Einstein-Æther Theory and Generalized TeVeS Theory after GW170817. Universe 2018, 4, 84.

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