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 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 language | English (US) |
---|---|
Article number | 024014 |
Journal | Physical Review D |
Volume | 66 |
Issue number | 2 |
DOIs | |
State | Published - 2002 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)