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Mimetic Horava gravity

delete2019-11-01
delete12
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OA
AI
A
Ali H. Chamseddine *
V
Viatcheslav Mukhanov
T
Tobias B. Russ
DOI:10.1016/j.physletb.2019.134939delete
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Abstract

Abstract

En 中文
We show that the scalar field of mimetic gravity could be used to construct diffeomorphism invariant models that reduce to Ho.rava gravity in the synchronous gauge. The gradient of the mimetic field provides a timelike unit vector field that allows to define a projection operator of four-dimensional tensors to three-dimensional spatial tensors. Conversely, it also enables us to write quantities invariant under space diffeomorphisms in fully covariant form without the need to introduce new propagating degrees of freedom. (C) 2019 The Authors. Published by Elsevier B.V.
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Journal

Physics Letters B cover
Physics Letters B
IF:
4.5
Papers:
3.2W
Citations:
7.3W

Organization

U
University of Munich
Scholars:
5.7W
Papers: 4.2W
Citations: 68
A
American University of Beirut
Scholars:
8.3K
Papers: 6.0K
Citations: 1.1W