Abstract
We study the time evolution of a quantum field under a Hamiltonian constructed in an earlier paper by taking the limits asn → ∞ of a Dicke maser model Hamiltonian forn radiating atoms. We show that the radiation field converges to a dynamic equilibrium state independent of its initial state and that the strength of the field is inversely proportional to the square of the distance from the source. A number of variations of the Hamiltonian are also considered.
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