Vacuum polarization in two-dimensional static spacetimes and dimensional reduction

Roberto Balbinot, Alessandro Fabbri, Piero Nicolini, Patrick J. Sutton

Research output: Contribution to journalArticlepeer-review


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 HartleHawking 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.

Original languageEnglish (US)
Article number024014
JournalPhysical Review D
Issue number2
StatePublished - 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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