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Journal Articles Physical Review D Year : 2014

Undoing the twist: The Hořava limit of Einstein-aether theory

Abstract

We show that Hořava gravity can be obtained from Einstein-aether theory in the limit that the twist coupling constant goes to infinity, while holding fixed the expansion, shear and acceleration couplings. This limit helps to clarify the relation between the two theories, and allows Hořava results to be obtained from Einstein-aether ones. The limit is illustrated with several examples, including rotating black hole equations, parametrized post-Newtonian parameters, and radiation rates from binary systems.
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insu-03645665 , version 1 (24-04-2022)

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Ted Jacobson. Undoing the twist: The Hořava limit of Einstein-aether theory. Physical Review D, 2014, 89, ⟨10.1103/PhysRevD.89.081501⟩. ⟨insu-03645665⟩
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