Dark matter-dark energy exchanges in an expanding universe

Authors

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

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Issue

Article ID

SPP-2019-PB-53

Section

Poster Session PB

Published

2019-05-23

How to Cite

[1]
JMZ Angeles and MIF 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://proceedings.spp-online.org/article/view/SPP-2019-PB-53.