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Conservation laws in gravity: A unified framework

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arxiv 1405.4003 v2 pith:3YGWRUPT submitted 2014-05-15 gr-qc hep-th

Yuri N. Obukhov , Dirk Puetzfeld This is my paper · ORCID
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keywords gravityconservationcouplingframeworkgenerallawsvariablesaction
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We study general metric-affine theories of gravity in which the metric and connection are the two independent fundamental variables. In this framework, we use Lagrange-Noether methods to derive the identities and the conservation laws that correspond to the invariance of the action under general coordinate transformations. The results obtained are applied to generalized models with nonminimal coupling of matter and gravity, with a coupling function that depends arbitrarily on the covariant gravitational field variables.

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  1. Friedmann cosmology with hyperfluids

    gr-qc 2024-11 conditional novelty 6.0 of 10

    For a class of hyperfluid models in metric-affine gravity, the FLRW evolution of H(t) and rho(t) keeps the general relativity form, with hypermomentum effects encoded only in modified barotropic indices.

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