Abstract
In this work, we have considered a model of the flat Friedmann–Robertson–Walker (FRW) Universe filled with cold dark matter and a chameleon field where the scale function is taken as (i) intermediate expansion and (ii) logamediate expansion. In both cases we find the expressions of the chameleon field, chameleon potential, statefinder parameters, and slow-roll parameters. Also, it has been shown that the potential always decreases with the chameleon field in both scenarios. The nature of the slow-roll parameters has been shown diagrammatically.
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Bachall, N.A., Ostriker, J.P., Perlmutter, S., Steinhardt, P.J.: Science 284, 1481 (1999)
Banerjee, N., Das, S.: Phys. Rev. D 78, 043512 (2008)
Banerjee, N., Das, S., Ganguly, K.: arXiv:0801.1204v1 [gr-qc] (2008)
Barrow, J.D., Nunes, N.J.: Phys. Rev. D 76, 043501 (2007)
Brax, P., Martin, J.: astro-ph/0210533 (2002)
Brax, P., van de Bruck, C., Davis, A.C., Khoury, J., Weltman, A.: AIP Conf. Proc. 736, 105 (2005). astro-ph/0410103
Bridle, S., Lahav, O., Ostriker, J.P., Steinhardt, P.J.: Science 299, 1532 (2003)
Khoury, J., Weltman, A.: Phys. Rev. Lett. 93, 171104 (2004). arXiv:astro-ph/0309300
Mota, D.F., Shaw, D.J.: Phys. Rev. Lett. 97, 151102 (2006)
Perlmutter, S., et al.: Bull. Am. Astron. Soc. 29, 1351 (1997)
Perlmutter, S.J., et al.: Astrophys. J. 517, 565 (1999)
Riess, A.G., et al.: Astron. J. 116, 1009 (1998)
Sahni, V., Saini, T.D., Starobinsky, A.A., Alam, U.: JETP Lett. 77, 201 (2003)
Tonry, J.L., et al.: Astrophys. J. 594, 1 (2003)
Wei, H., Cai, R.-G.: Phys. Rev. D 71, 043504 (2005)
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Khatua, P.B., Debnath, U. Role of chameleon field in accelerating Universe. Astrophys Space Sci 326, 53–60 (2010). https://doi.org/10.1007/s10509-009-0207-3
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DOI: https://doi.org/10.1007/s10509-009-0207-3