An Effective Sign Switching Dark Energy: Lotka-Volterra Model of Two Interacting Fluids

Understand

One of the recent attempts to address the Hubble and $S_8$ tensions is to consider the Universe started out not as a de Sitter-like spacetime, but rather anti-de Sitter-like.

• That is, the Universe underwent an "AdS-to-dS" transition at some point.
• We study the possibility that there are two dark energy fluids, one of which gave rise to the anti-de Sitter-like early Universe.
• The interaction is modeled by the Lotka-Volterra equations, commonly used in population biology.