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Anisotropic Cosmological Models with Variable G and Decaying Vacuum Energy

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Abstract

We present Bianchi type-I cosmological models with a perfect fluid source and time-dependent gravitational and cosmological constants based on new exact solutions of Einstein’s equations. The perfect fluid is chosen to obey a barotropic equation of state. The models obtained represent a radiation dominated phase and a dust era. In some of the models the expansion changes from a decelerating phase to an accelerating one and these models asymptotically tend to the de Sitter universe.

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Authors and Affiliations

  1. Department of Mathematical Sciences, A.P.S. University, Rewa, India

    J. P. Singh

  2. Department of Mathematics, IET, MJP Rohilkhand University, Bareilly, India

    A. Prasad

  3. Department of Mathematics, Govt. Model Science College, Rewa, India

    R. K. Tiwari

Authors
  1. J. P. Singh
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  2. A. Prasad
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  3. R. K. Tiwari
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Corresponding author

Correspondence to J. P. Singh.

Additional information

The paper is dedicated to late Prof. S.R. Roy, Ex-Head, Department of Mathematics, Banaras Hindu University, Varanasi, India.

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Singh, J.P., Prasad, A. & Tiwari, R.K. Anisotropic Cosmological Models with Variable G and Decaying Vacuum Energy. Int J Theor Phys 47, 1559–1570 (2008). https://doi.org/10.1007/s10773-007-9597-6

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  • DOI: https://doi.org/10.1007/s10773-007-9597-6

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