The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Accelerated expansion of the universe driven by tachyonic matter
Open accessAbstract
It is an accepted practice in cosmology to invoke a scalar field with a potential $V(\ensuremath{\varphi})$ when the observed evolution of the universe cannot be reconciled with theoretical prejudices. Since one function degree of freedom in the expansion factor $a(t)$ can be traded off for the function $V(\ensuremath{\varphi}),$ it is always possible to find a scalar field potential which will reproduce a given evolution. I provide a recipe for determining $V(\ensuremath{\varphi})$ from $a(t)$ in two cases: (i) a normal scalar field with the Lagrangian $\mathcal{L}=(1/2){\ensuremath{\partial}}_{a}\ensuremath{\varphi}{\ensuremath{\partial}}^{a}\ensuremath{\varphi}\ensuremath{-}V(\ensuremath{\varphi})$ used in quintessence or dark energy models; (ii) a tachyonic field with the Lagrangian $\mathcal{L}=\ensuremath{-}V(\ensuremath{\varphi})[1\ensuremath{-}{\ensuremath{\partial}}_{a}\ensuremath{\varphi}\ensuremath{\partial}{}^{a}\ensuremath{\varphi}{]}^{1/2},$ motivated by recent string theoretic results. In the latter case, it is possible to have accelerated expansion of the universe during the late phase in certain cases.
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Cites
Cosmological consequences of a rolling homogeneous scalar field
Ratra, B., & Peebles, P. J. E. (1988) · Physical Review D · doi:10.1103/physrevd.37.3406 · Cited by 4,310
THE CASE FOR A POSITIVE COSMOLOGICAL Λ-TERM
SAHNI, V., & STAROBINSKY, A. (2000) · International Journal of Modern Physics D · doi:10.1142/s0218271800000542 · Cited by 2,767
Armendáriz-Picón, C., Damour, T., & Mukhanov, V. (1999) · Physics Letters B · doi:10.1016/s0370-2693(99)00603-6 · Cited by 1,846
Cited by
Capozziello, S., & De Laurentis, M. (2011) · Physics Reports · doi:10.1016/j.physrep.2011.09.003 · Cited by 3,321
Bamba, K., Capozziello, S., Nojiri, S., & Odintsov, S. D. (2012) · Astrophysics and Space Science · doi:10.1007/s10509-012-1181-8 · Cited by 2,387
Beyond the cosmological standard model
Joyce, A., Jain, B., Khoury, J., & Trodden, M. (2015) · Physics Reports · doi:10.1016/j.physrep.2014.12.002 · Cited by 1,231
Inflation dynamics and reheating
Bassett, B. A., Tsujikawa, S., & Wands, D. (2006) · Reviews of Modern Physics · doi:10.1103/revmodphys.78.537 · Cited by 1,020
Extended theories of gravity and their cosmological and astrophysical applications
Capozziello, S., & Francaviglia, M. (2008) · General Relativity and Gravitation · doi:10.1007/s10714-007-0551-y · Cited by 874
Metadata
- Authors
- Padmanabhan, T.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2002-06-28
- Volume
- 66
- Issue
- 2
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W2067681837
- Cited by
- 997
- References
- 3
- FWCI
- 29.62
- Type
- journal article
- Language
- en
- Open access
- green
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