Semiclassical gravitational effects around global monopole in Brans-Dicke theory
F.Rahaman, P.Ghosh
TL;DR
This paper investigates the semiclassical gravitational effects of a global monopole within Brans-Dicke theory, extending previous work on quantum field stress-energy tensors in monopole spacetimes.
Contribution
It introduces an analysis of quantum stress-energy effects around monopoles specifically in Brans-Dicke gravity, a novel extension of prior semiclassical studies.
Findings
Quantum stress-energy tensor influences the spacetime structure.
Brans-Dicke scalar field modifies monopole gravitational effects.
Results differ from general relativity predictions.
Abstract
In recent past, W.A.Hiscock [ Class.Quan.Grav. (1990) 7,6235 ] studied the semi classical gravitational effects around global monopole. He obtained the vacuum expectation value of the stress-energy tensor of an arbitrary collection of conformal mass less free quantum fields (scalar, spinor and vectors) in the space time of a global monopole. With this stress-energy tensor, we study the semi classical gravitational effects of a global monopole in the context of Brans-Dicke theory of gravity.
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