Stability of the curvature perturbation in dark sectors' mutual interacting models

By Jian-hua He, Bin Wang, E. Abdalla. 2008

152 citations recorded by the source corpus.

Abstract We consider perturbations in a cosmological model with a small coupling between dark energy and dark matter. We prove that the stability of the curvature perturbation depends on the type of coupling between dark sectors. When the dark energy is of quintessence type, if the coupling is proportional to the dark matter energy density, it will drive the instability in the curvature perturbations; however if the coupling is proportional to the energy density of dark energy, there is room for the stability in the curvature perturbations. When the dark energy is of phantom type, the perturbations are always stable, no matter whether the coupling is proportional to the one or the other energy density.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/be7f1f23f854aff9e0245c0052fdf6c0061c5ccc

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. S. Vagnozzi
2. E. di Valentino
3. O. Mena
4. A. Melchiorri
5. E. Majerotto
6. R. Maartens
7. J. Valiviita
8. Supriya Pan

In Nuclear and High Energy Physics

1. S. Vagnozzi
2. E. di Valentino
3. O. Mena
4. A. Melchiorri
5. E. Majerotto
6. R. Maartens
7. J. Valiviita
8. Supriya Pan

Citations in the corpus

• The growth of structure in interacting dark energy models (2009, unknown): “[7–28]).”
• Nonminimal dark sector physics and cosmological tensions (2019, background): “Apart from the gravitational instabilities present when w = −1 [151, 228], there may also be early-time instabilities [151, 152, 157, 227–229], and avoiding them leads to imposing stability conditions on w and ξ.”
• Observational constraints on an interacting dark energy model (2009, background): “While we were finalizing this paper, a work on other type of dark sector interaction appeared also suggesting that the interaction could be detected via its effects on the ISW signal (He et al. 2009).”
• Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, methodology): “interacting vacuum), IDE models can suffer from gravitational instabilities [144, 265].”