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Generalized second law of thermodynamics in f(T) gravity
Open accessAbstract
We investigate the validity of the generalized second law (GSL) of gravitational thermodynamics in the framework of f ( T ) modified teleparallel gravity. We consider a spatially flat FRW universe containing only the pressureless matter. The boundary of the universe is assumed to be enclosed by the Hubble horizon. For two viable f ( T ) models containing f ( T ) = T +μ 1 {(− T )} n and f ( T ) = T −μ 2 T (1− e β T 0 / T ), we first calculate the effective equation of state and deceleration parameters. Then, {we investigate the null and strong energy conditions and conclude that a sudden future singularity appears in both models. Furthermore, using a cosmographic analysis we check the viability of two models. Finally, we examine the validity of the GSL and find that for both models it} is satisfied from the early times to the present epoch. But in the future, the GSL is violated for the special ranges of the torsion scalar T .
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Cites
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Riess, A. G., Filippenko, A. V., Challis, P., Clocchiatti, A., Diercks, A., Garnavich, P. M., Gilliland, R. L., Hogan, C. J., Jha, S., Kirshner, R. P., et al. (1998) · The Astronomical Journal · doi:10.1086/300499 · Cited by 19,704
Measurements of Ω and Λ from 42 High‐Redshift Supernovae
Perlmutter, S., Aldering, G., Goldhaber, G., Knop, R. A., Nugent, P., Castro, P. G., Deustua, S., Fabbro, S., Goobar, A., Groom, D. E., et al. (1999) · The Astrophysical Journal · doi:10.1086/307221 · Cited by 18,062
4D gravity on a brane in 5D Minkowski space
Dvali, G., Gabadadze, G., & Porrati, M. (2000) · Physics Letters B · doi:10.1016/s0370-2693(00)00669-9 · Cited by 3,513
A LARGER ESTIMATE OF THE ENTROPY OF THE UNIVERSE
Egan, C. A., & Lineweaver, C. H. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/710/2/1825 · Cited by 232
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
Metadata
- Authors
- Karami, K., & Abdolmaleki, A.
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2012-04-10
- Volume
- 2012
- Issue
- 04
- Pages
- 007-007
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W2019289187
- Cited by
- 165
- References
- 4
- FWCI
- 9.92
- Type
- journal article
- Language
- en
- Open access
- green
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- Karami, K., & Abdolmaleki, A. (2012). Generalized second law of thermodynamics in f(T) gravity. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2012/04/007
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