Bianchi Type-I String Cosmological Model with Bulk Viscosity and Time-Dependent <em>Λ</em> term

doi:10.1088/0256-307X/28/9/090401

Chin. Phys. Lett.

2011, Vol. 28

Issue (9): 090401 DOI: 10.1088/0256-307X/28/9/090401

GENERAL

Bianchi Type-I String Cosmological Model with Bulk Viscosity and Time-Dependent Λ term

R. K. Tiwari^1*, S. Sharma^2**

¹Department of Mathematics, Govt. Model Science College, Rewa (MP) India
²Department of Mathematics, Rayat Polytechnic College, SBS Nagar, (Punjab) India

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R. K. Tiwari, S. Sharma 2011 Chin. Phys. Lett. 28 090401

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Abstract Einstein field equations with the cosmological constant is considered in the presence of bulk viscosity in a Bianchi type-I universe. Solutions of the field equations are obtained by assuming the following conditions: the bulk viscosity is proportional to the expansion scalar ξ∝θ; the expansion scalar is proportional to shear scalar θ∝σ; and Λ is proportional to the Hubble parameter Λ∝H. The corresponding interpretations of the cosmological solutions are also discussed.

Keywords: 04.20.Jb 98.80.Cq

Received: 13 February 2011 Published: 30 August 2011

PACS:	04.20.Jb	(Exact solutions)
	98.80.Cq	(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))

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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/9/090401 OR https://cpl.iphy.ac.cn/Y2011/V28/I9/090401

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