The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.
Large-scale instability in interacting dark energy and dark matter fluids
Open accessAbstract
If dark energy interacts with dark matter, this gives a new approach to the coincidence problem. But interacting dark energy models can suffer from pathologies. We consider the case where the dark energy is modelled as a fluid with constant equation of state parameter w . Non-interacting constant- w models are well behaved in the background and in the perturbed universe. But the combination of constant w and a simple interaction with dark matter leads to an instability in the dark sector perturbations at early times: the curvature perturbation blows up on super-Hubble scales. Our results underline how important it is to carefully analyse the relativistic perturbations when considering models of coupled dark energy. The instability that we find has been missed in some previous work where the perturbations were not consistently treated. The unstable mode dominates even if adiabatic initial conditions are used. The instability also arises regardless of how weak the coupling is. This non-adiabatic instability is different from previously discovered adiabatic instabilities on small scales in the strong-coupling regime.
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Cites
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Cosmological Perturbation Theory
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Transition of the dark energy equation of state in an interacting holographic dark energy model
Wang, B., Gong, Y., & Abdalla, E. (2005) · Physics Letters B · doi:10.1016/j.physletb.2005.08.008 · Cited by 634
Scaling solutions in general nonminimal coupling theories
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Interacting quintessence solution to the coincidence problem
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The end of unified dark matter?
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Cited by
In the realm of the Hubble tension—a review of solutions *
Di Valentino, E., Mena, O., Pan, S., Visinelli, L., Yang, W., Melchiorri, A., Mota, D. F., Riess, A. G., & Silk, J. (2021) · Classical and Quantum Gravity · doi:10.1088/1361-6382/ac086d · Cited by 2,065
Cosmology and Fundamental Physics with the Euclid Satellite
The Euclid Theory Working Group, Amendola, L., Appleby, S., Bacon, D., Baker, T., Baldi, M., Bartolo, N., Blanchard, A., Bonvin, C., Borgani, S., et al. (2013) · Living Reviews in Relativity · doi:10.12942/lrr-2013-6 · Cited by 899
Self-citationDi Valentino, E. (2021) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stab187 · Cited by 138
Hoshiya, K., & Toda, Y. (2023) · Physical Review D · doi:10.1103/physrevd.107.043505 · Cited by 18
Metadata
- Authors
- Väliviita, J., Majerotto, E., & Maartens, R.
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2008-07-28
- Volume
- 2008
- Issue
- 07
- Pages
- 020
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W2082050761
- Cited by
- 391
- References
- 36
- FWCI
- 12.77
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Väliviita, J., Majerotto, E., & Maartens, R. (2008). Large-scale instability in interacting dark energy and dark matter fluids. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2008/07/020
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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