Semiclassical charged black holes with a quantized massive scalar field - art. no. 084021

Semiclassical perturbations to the Reissner-Nordstrom metric caused by the presence of a quantized massive scalar held with arbitrary curvature coupli ng are Found to first older in epsilon=(h) over bar/M-2. The DeWitt-Schwing er approximation is used to determine the vacuum stress-energy tensor of th e massive scalar field. When the semiclassical perturbation are taken into account, we find extreme black holes will have a charge-to-mass ratio that exceeds unity, as measured at infinity. The effects of the perturbations on the black hole temperature (surface gravity) are studied in detail, with p articular emphasis on near extreme "bare" states that might become precisel y zero temperature "dressed" semiclassical black hole states. We find that for minimally or conformally coupled scalar fields there are ito zero tempe rature solutions among the perturbed black holes.