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Anisotropic Bianchi-I universe with phantom field and cosmological constant

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Abstract

We study an anisotropic Bianchi-I universe in the presence of a phantom field and a cosmological constant. Cosmological solutions are obtained when the kinetic energy of the phantom field is of the order of anisotropy and dominates over the potential energy of the field. The anisotropy of the universe decreases and the universe transits to an isotropic flat FRW universe accommodating the present acceleration. A class of new cosmological solutions is obtained for an anisotropic universe in case an initial anisotropy exists which is bigger than the value determined by the parameter of the kinetic part of the field. Later, an autonomous system of equations for an axially symmetric Bianchi-I universe with phantom field in an exponential potential is studied. We discuss the stability of the cosmological solutions.

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Author notes

  1. Dilip Paul

    Present address: Khoribari High School (H.S.), Khoribari, Dist., Darjeeling, 734 427, India

Authors and Affiliations

  1. Department of Physics, North Bengal University, Siliguri, Dist. Darjeeling, 734 013, India

    Bikash Chandra Paul & Dilip Paul

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  1. Bikash Chandra Paul
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  2. Dilip Paul
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Correspondence to Bikash Chandra Paul.

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Paul, B.C., Paul, D. Anisotropic Bianchi-I universe with phantom field and cosmological constant. Pramana - J Phys 71, 1247–1257 (2008). https://doi.org/10.1007/s12043-008-0179-9

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  • DOI: https://doi.org/10.1007/s12043-008-0179-9

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