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Einstein's Equations in Matter

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arxiv 1907.04976 v2 pith:WRWPDEA2 submitted 2019-07-11 gr-qc hep-phhep-th

Einstein's Equations in Matter

classification gr-qc hep-phhep-th
keywords equationsmattereinsteineffectivefluidsgravitationalillustrateanalogues
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Einstein's equations in matter are gravitational analogues of Maxwell's equations in matter, providing an effective classical description of gravitational fields. We derive Einstein's equations in matter for relativistic fluids, and use them to illustrate how the Tolman-Oppenheimer-Volkoff equations are modified by the matter's response to curvature. For a gas of massive fermions, we evaluate how the effective Newton's constant and other susceptibilities depend on the temperature and density. In anti-de Sitter space, we study the $O(1/(T\ell)^2)$ corrections to the geometries sourced by perfect fluids, and illustrate the breakdown of hydrostatics in AdS at small temperatures.

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Cited by 1 Pith paper

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  1. Carroll hydrodynamics with spin

    hep-th 2026-01 unverdicted novelty 6.0

    Carroll hydrodynamics with spin is obtained as the c→0 limit of relativistic hydrodynamics with spin, extending the description of boost-invariant flows.