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Dynamics of scalar perturbations inf(R,T)gravity
Open accessAbstract
In the context of $f(R,T)$ theories of gravity, we study the evolution of scalar cosmological perturbations in the metric formalism. According to restrictions on the background evolution, a specific model within these theories is assumed in order to guarantee the standard continuity equation. Using a completely general procedure, we find the complete set of differential equations for the matter density perturbations. In the case of sub-Hubble modes, the density contrast evolution reduces to a second-order equation. We show that for well-motivated $f(R,T)$ Lagrangians the quasistatic approximation yields to very different results from the ones derived in the frame of the concordance $\ensuremath{\Lambda}\mathrm{CDM}$ model constraining severely the viability of such theories.
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Cites
Gauge-invariant cosmological perturbations
Bardeen, J. M. (1980) · Physical Review D · doi:10.1103/physrevd.22.1882 · Cited by 2,393
Ishak, M., Upadhye, A., & Spergel, D. N. (2006) · Physical Review D · doi:10.1103/physrevd.74.043513 · Cited by 239
Cited by
Modified gravity theories on a nutshell: Inflation, bounce and late-time evolution
Nojiri, S., Odintsov, S. D., & Oikonomou, V. K. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.06.001 · Cited by 2,734
Thermodynamic interpretation of the generalized gravity models with geometry-matter coupling
Harko, T. (2014) · Physical Review D · doi:10.1103/physrevd.90.044067 · Cited by 289
Metadata
- Authors
- Alvarenga, F. G., de la Cruz-Dombriz, A., Houndjo, M. J. S., Rodrigues, M. E., & Sáez-Gómez, D.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2013-05-28
- Volume
- 87
- Issue
- 10
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W1995520143
- Cited by
- 283
- References
- 2
- FWCI
- 12.94
- Type
- journal article
- Language
- en
- Open access
- green
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- Alvarenga, F. G., de la Cruz-Dombriz, A., Houndjo, M. J. S., Rodrigues, M. E., & Sáez-Gómez, D. (2013). Dynamics of scalar perturbations inf(R,T)gravity. Physical Review D. https://doi.org/10.1103/physrevd.87.103526
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