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Time asymmetric extensions of general relativity

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arxiv 1503.06085 v1 pith:LH7ODDRV submitted 2015-03-20 gr-qc astro-ph.COhep-th

Marina Cortes , Henrique Gomes , Lee Smolin This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords generalrelativitytimeachievedalgebraasymmetricbreaksclass
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We describe a class of modified gravity theories that deform general relativity in a way that breaks time reversal invariance and, very mildly, locality. The algebra of constraints, local physical degrees of freedom, and their linearized equations of motion, are unchanged, yet observable effects may be present on cosmological scales, which have implications for the early history of the universe. This is achieved in the Hamiltonian framework, in a way that requires the constant mean curvature gauge conditions and is, hence, inspired by shape dynamics.

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