Dark matter-dark energy exchanges in an expanding universe

  • Janna May Zulueta Angeles National Institute of Physics, University of the Philippines Diliman
  • Michael Ian Francis Vega, II National Institute of Physics, University of the Philippines Diliman

Abstract

We revisit Aydiner's 'Chaotic universe model' (2018) that considers a hypothetical coupling between dark matter and dark energy in a spatially flat, Friedman-Robertson-Walker universe. In this model, dark matter and dark energy are perfect fluids able to transform into each other through a specified coupling function. We extend Aydiner's analysis by dropping his assumption of a constant Hubble parameter, an assumption that is valid only on short time scales. In this more general setting, and using a dynamical systems approach, we explore the effect of coupling on the dark matter/energy densities. We show that the cyclic dynamics between the two dark elements persists only when wdₑ > -1. For other values of wdₑ, either dark matter vanishes and dark energy becomes constant or both disappear completely.

Published
2019-05-23
How to Cite
[1]
J. M. Angeles and M. I. F. Vega. Dark matter-dark energy exchanges in an expanding universe, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-PB-53 (2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-PB-53.