Cosmologies with energy exchange
By John D. Barrow, T. Clifton. 2006
205 citations recorded by the source corpus.
We provide a simple mathematical description of the exchange of energy between two fluids in an expanding Friedmann universe with zero spatial curvature. The evolution can be reduced to a single nonlinear differential equation which we solve in physically relevant cases and provide an analysis of all the possible evolutions. Particular power-law solutions exist for the expansion scale factor and are attractors at late times under particular conditions. We show how a number of problems studied in the literature, such as cosmological vacuum-energy decay, particle annihilation, and the evolution of a population of evaporating black holes, correspond to simple particular cases of our model. In all cases we can determine the effects of the energy transfer on the expansion scale factor. We also consider the situation in the presence of 'antidecaying' fluids and so-called 'phantom' fluids which violate the dominant energy conditions.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/9736b8037edbc9e551db36d466d96086e28233cf
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Citations in the corpus
- Interacting scenarios with dynamical dark energy: Observational constraints and alleviation of the H0 tension (2019, unknown): “[12] J.”
- Nonminimal dark sector physics and cosmological tensions (2019, unknown): “[147–194] and Ref.”
- Expansion History with Decaying Vacuum: A Complete Cosmological Scenario (2012, unknown): “…(Shapiro & Solà 2000; Shapiro & Solà 2002; Alcaniz & Maia 2003; Opher & Pellison 2004; Bauer 2005; Carneiro & Lima 2005; Alcaniz & Lima 2005; Barrow & Clifton 2006; Montenegro & Carneiro 2007; Shapiro & Solà 2009; Solà & Štefančić 2005, 2006; Basilakos 2009; Solà 2011 and…”
- Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, background): “[130–239], for a recent comprehensive review see [200]).”