We compute the expectations of the squares of the electric and magnetic fields in the vacuum region outside a half–space filled with a uniform non–dispersive dielectric. This gives predictions for… (More)

This article is a conceptual discussion, for non-specialists, of what appears to be a satisfactory solution to the problem of treating angular momentum for isolated radiating systems in general… (More)

I show that attempts to detect Hawking quanta would reduce the quantum state to one containing ultra-energetic incoming particles; couplings of these to other systems would extract ultra-high… (More)

We compute the stress–energy operator for a scalar linear quantum field in curved space–time, modulo c–numbers. For the associated Hamiltonian operators, even those generating evolution along… (More)

The prediction that black holes radiate due to quantum effects is often considered one of the most secure in quantum field theory in curved space–time. Yet this prediction rests on two dubious… (More)

For linear bose field theories, I show that if a classical Hamiltonian function is strictly positive in a suitable sense, the classical evolution must be conjugate, by a symplectic motion, to a… (More)

Almost twenty–five years ago, Davies and Fulling [1,2], following a suggestion of DeWitt [3] (see also [4]), introduced the “moving mirror” models: massless scalar quantum fields in two–dimensional… (More)

Hawking’s prediction of black–hole evaporation depends on the application of known physics to fantastically high energies — well beyond the Planck scale. Here, I show that before these extreme… (More)

Black holes are extreme manifestations of general relativity, so one might hope that exotic quantum effects would be amplified in their vicinities, perhaps providing clues to quantum gravity. The… (More)

For linear scalar field theories, I characterize those classical Hamiltonian vector fields which have self–adjoint operators as their quantum counterparts. As an application, it is shown that for a… (More)