Massive scalar field near a cosmic string
Devis Iellici (University of Trento, Italy)
TL;DR
This paper calculates the vacuum fluctuations and energy-momentum tensor of a massive scalar field near a cosmic string using zeta function and point-splitting methods, with implications for related quantum field theories.
Contribution
It introduces a detailed computation of vacuum properties of a scalar field in a cosmic string background, extending to self-interacting fields and finite-temperature scenarios.
Findings
Vacuum fluctuation expressions near a cosmic string
Energy-momentum tensor expectation values derived
Potential applications to self-interacting fields and thermal space
Abstract
The function of a massive scalar field near a cosmic string is computed and then employed to find the vacuum fluctuation of the field. The vacuum expectation value of the energy-momentum tensor is also computed using a point-splitting approach. The obtained results could be useful also for the case of self-interacting scalar fields and for the finite-temperature Rindler space theory.
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