Original scientific paper

Semi-classical gravitational effects near cosmic string in Lyra geometry

F. Rahaman ; Department of Mathematics, Jadavpur University, Kolkata-700032, India
S. Mal ; Department of Mathematics, Jadavpur University, Kolkata-700032, India
S. Shekhar ; Department of Mathematics, Jadavpur University, Kolkata-700032, India
P. Ghosh ; Department of Mathematics, Jadavpur University, Kolkata-700032, India
T. Ray ; Department of Mathematics, Jadavpur University, Kolkata-700032, India

Abstract

In recent past, W. A. Hiscock [Phys. Lett. B 188 (1987) 317] studied the semi-classical gravitational effects near cosmic strings. He obtained the vacuum expectation value of the stress-energy tensor of an arbitrary collection of conformal massless free-quantum fields (scalar, spinor and vectors) in the presence of a static, cylindrically symmetric cosmic string. With this stress-energy tensor, we study the semi-classical gravitational effects of a cosmic string in the context of Lyra geometry.

Keywords

cosmic string; gravitational effects; semi-classical approach; Lyra geometry

Hrčak ID:

304144

URI

https://hrcak.srce.hr/304144

Publication date:

1.8.2005.

Article data in other languages: croatian

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