Chin. Phys. Lett.  2003, Vol. 20 Issue (10): 1674-1677    DOI:
Original Articles |
Bianchi Type-I Cosmology with Cosmic String and Bulk Viscosity
WANG Xing-Xiang
Department of Physics, Anhui Normal University, Wuhu 241000
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WANG Xing-Xiang 2003 Chin. Phys. Lett. 20 1674-1677
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Abstract Some locally rotationally symmetric Bianchi type-I cosmological solutions for a cloud string with bulk viscosity are presented. In the first case, an equation of state ρ = kλ and the relation between metric potentials R = ASn are considered, and the solution represents shearing non-rotating model with the bulk viscosity ∝ ρ1/2, where ρ is the rest energy density of the cloud of strings with particles attached to them, λ is the tension density of the cloud of strings, is the coefficient of the bulk viscosity, R and S are only the functions of time t, while A and k are constant. In the second case, the constant coefficient of bulk viscosity is considered.
Keywords: 04.20.Jb      98.80.Cq     
Published: 01 October 2003
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/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I10/01674
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