Cosmic expansion and structure formation in running vacuum cosmologies

  title={Cosmic expansion and structure formation in running vacuum cosmologies},
  author={Spyros Basilakos},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  • S. Basilakos
  • Published 15 January 2015
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
We investigate the dynamics of the FLRW flat cosmological models in which the vacuum energy varies with redshift. A particularly well motivated model of this type is the so-called quantum field vacuum, in which both kind of terms $H^{2}$ and constant appear in the effective dark energy density affecting the evolution of the main cosmological functions at the background and perturbation levels. Specifically, it turns out that the functional form of the quantum vacuum endows the vacuum energy of… 

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