Vacuum polarization in two-dimensional static spacetimes and dimensional reduction

Balbinot, Roberto, Fabbri, Alessandro, Nicolini, Piero and Sutton, Patrick J. ORCID: https://orcid.org/0000-0003-1614-3922 2002. Vacuum polarization in two-dimensional static spacetimes and dimensional reduction. Physical Review D 66 (2) , 024014. 10.1103/PhysRevD.66.024014

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Abstract

We obtain an analytic approximation for the effective action of a quantum scalar field in a general static two-dimensional spacetime. We apply this to the dilaton gravity model resulting from the spherical reduction of a massive, non-minimally coupled scalar field in the four-dimensional Schwarzschild geometry. Careful analysis near the event horizon shows the resulting two-dimensional system to be regular in the Hartle-Hawking state for general values of the field mass, coupling, and angular momentum, while at spatial infinity it reduces to a thermal gas at the black-hole temperature.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	American Physical Society
ISSN:	0556-2821
Last Modified:	13 Jan 2023 03:22
URI:	https://orca.cardiff.ac.uk/id/eprint/35958

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