Vacuum Polarization in the Spacetime of a Scalar-Tensor Cosmic String
V. B. Bezerra (UFPb), R. M. Teixeira Filho (UFPb, UFBA), G. Grebot, (UnB), M. E. X. Guimaraes (UnB)
TL;DR
This paper investigates how a scalar-tensor cosmic string influences vacuum polarization effects, calculating the energy-momentum tensor's expectation values and highlighting the dilaton field's role in this process.
Contribution
It provides the first detailed analysis of vacuum polarization around a scalar-tensor cosmic string, including the explicit contribution of the dilaton field.
Findings
Dilaton field significantly affects vacuum polarization effects.
Explicit expressions for the energy-momentum tensor are derived.
The results enhance understanding of quantum effects in scalar-tensor gravity.
Abstract
We study the vacuum polarization effect in the spacetime generated by a magnetic flux cosmic string in the framework of a scalar-tensor gravity. The vacuum expectation values of the energy-momentum tensor of a conformally coupled scalar field are calculated. The dilaton's contribution to the vacuum polarization effect is shown explicitly.
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