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- Title
Ghost Condensates and Pure Kinetic k -Essence Condensates in the Presence of Field–Fluid Non-Minimal Coupling in the Dark Sector.
- Authors
Hussain, Saddam; Chatterjee, Anirban; Bhattacharya, Kaushik
- Abstract
In this article, we try to determine the conditions when a ghost field, in conjunction with a barotropic fluid, produces a stable accelerating expansion phase of the universe. It is seen that, in many cases, the ghost field produces a condensate and drives the fluid energy density to zero in the final accelerating phase, but there can be other possibilities. We have shown that a pure kinetic k-essence field (which is not a ghost field) interacting with a fluid can also form an interaction-induced condensate and produce a stable accelerating phase of the universe. In the latter case, the fluid energy density does not vanish in the stable phase.
- Subjects
EXPANDING universe; ENERGY density; DARK energy; DARK matter
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 2, p65
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9020065