# Cosmic expansion and structure formation in running vacuum cosmologies

@article{Basilakos2015CosmicEA, title={Cosmic expansion and structure formation in running vacuum cosmologies}, author={Spyros Basilakos}, journal={arXiv: Cosmology and Nongalactic Astrophysics}, year={2015} }

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…

## 7 Citations

### Running vacuum cosmological models: linear scalar perturbations

- Physics
- 2017

In cosmology, phenomenologically motivated expressions for running vacuum are commonly parameterized as linear functions typically denoted by Λ(H2) or Λ(R). Such models assume an equation of state…

### Possible signals of vacuum dynamics in the Universe

- Physics
- 2018

We study a generic class of time-evolving vacuum models which can provide a better phenomenological account of the overall cosmological observations as compared to the $\Lambda$CDM. Among these…

### Cosmic Acceleration from Varying Masses in Five Dimensions

- Physics
- 2015

Much effort has been made in trying to solve or at least evade the inconsistencies that emerge from general relativity as the framework for a cosmological model. The extradimensional models rise as…

### Growth index of matter perturbations in running vacuum models

- Materials Science, Mathematics
- 2015

We derive for the first time the growth index of matter perturbations of the Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) flat cosmological models in which the vacuum energy depends on redshift. A…

### The $R_{\mathrm{h}}=ct$ universe and quintessence

- Physics
- 2016

Over the last few years the $R_{\mathrm{h}}=ct$ universe has received a lot of attention, particularly when observational evidence seems to favor this over the standard $\Lambda$ cold dark matter…

### Fundamental Constants in Physics and Their Time Variation

- Physics, Education
- 2015

There is no doubt that the field of Fundamental Constants in Physics and Their Time Variation is one of the hottest subjects in modern theoretical and experimental physics, with potential…

### Fundamental constants and cosmic vacuum: the micro and macro connection

- Physics
- 2015

The idea that the vacuum energy density $\rho_{\Lambda}$ could be time dependent is a most reasonable one in the expanding Universe; in fact, much more reasonable than just a rigid cosmological…

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