| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Cosmological perturbations in the interacting dark sector: Mapping fields and fluids | Joseph P Johnson
; S. Shankaranarayanan
; | Date: |
5 Jun 2020 | Abstract: | There is no unique way to describe the dark energy-dark matter interaction,
as we have little information about the nature and dynamics of the dark sector.
Hence, in many of the phenomenological dark matter fluid interaction models in
the literature, the interaction strength $Q_{
u}$ in the dark sector is
introduced by hand. Demanding that the interaction strength $Q_{
u}$ in the
dark sector must have a field theory description, we obtain a unique form of
interaction strength. We show the equivalence between the fields and fluids for
the $f(R,chi)$ model where $f$ is an arbitrary, smooth function of $R$ and the
scalar field $chi$, which represents dark matter. Up to first order in
perturbations, we show that the one-to-one mapping between the field theory
description and the phenomenological fluid description of interacting dark
energy and dark matter exists emph{only} for this unique form of interaction.
We then classify the interacting dark energy models considered in the
literature into two categories based on the field-theoretic description. | Source: | arXiv, 2006.4618 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |