Thermodynamics of diffusive DM/DE systems

@article{Haba2016ThermodynamicsOD,
  title={Thermodynamics of diffusive DM/DE systems},
  author={Zbigniew Haba},
  journal={General Relativity and Gravitation},
  year={2016},
  volume={49},
  pages={1-21}
}
  • Zbigniew Haba
  • Published 18 December 2016
  • Physics
  • General Relativity and Gravitation
We discuss the energy density, temperature and entropy of dark matter (DM) and dark energy (DE) as functions of the scale factor a in an expanding universe. In a model of non-interacting dark components we repeat a derivation from thermodynamics of the well-known relations between the energy density, entropy and temperature. In particular, the entropy is constant as a consequence of the energy conservation. We consider a model of a DM/DE interaction where the DM energy density increase is… 

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