Mimetic dark matter

Ali H. Chamseddine, Viatcheslav Mukhanov

doi:10.1007/jhep11(2013)135

Mimetic dark matter

DOI PDF Web Site Web Site 被引用文献27件

書誌事項

公開日: 2013-11

権利情報

https://creativecommons.org/licenses/by/2.0
https://creativecommons.org/licenses/by/2.0

DOI

10.1007/jhep11(2013)135

公開者: Springer Science and Business Media LLC

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説明

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>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.</jats:p>