Chameleon scalar field in LRS Bianchi type I cosmological model

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• 作者：R. Chaubey ; Ashutosh Singh ; Rakesh Raushan
• 刊名：Gravitation and Cosmology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：22
• 期：1
• 页码：54-63
• 全文大小：673 KB
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• 作者单位：R. Chaubey (1)
  Ashutosh Singh (1)
  Rakesh Raushan (1)
  
  1. DST-Centre for Interdisciplinary Mathematical Sciences, Institute of Science, Banaras Hindu University, Varanasi, India
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Relativity and Cosmology
  Astronomy
  Astrophysics
  Quantum Physics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1995-0721

文摘

We consider an anisotropic cosmological model with cold dark matter and a scalar field, where one component of the scale factor is taken in the framework of (i) a logamediate scenario (ii) an intermediate scenario, and (iii) an emergent scenario. In all cases we find expressions for the Chameleon field, Chameleon potential, the statefinder diagnostic pair, i.e., the {r, s} parameters, and the slow-roll parameters. All physical parameters are calculated and discussed in all three cases. It is also shown how the Chameleon field is directly affected by the role of curvature of space time. At large times (t→∞) the models tend asymptotically to an isotropic Friedmann–Robertson–Walker cosmological model.