Mimetic dark matter

doi:10.1007/JHEP11(2013)135

Mimetic dark matter

2013-11-18

203

OA

AI

A

Ali H. Chamseddine *

M

Mukhanov, Viatcheslav

DOI：10.1007/JHEP11(2013)135

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We modify Einstein's theory of gravity, isolating the conformal degree of freedom in a covariant way. This is done by introducing a physical metric defined in terms of an auxiliary metric and a scalar field appearing through its first derivatives. The resulting equations of motion split into a traceless equation obtained through variation with respect to the auxiliary metric and an additional differential equation for the trace part. As a result the conformal degree of freedom becomes dynamical even in the absence of matter. We show that this extra degree of freedom can mimic cold dark matter.

Keyword:

Cosmology of Theories beyond the SM

Classical Theories of Gravity

Mimetic dark matter

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