# Quantum theory of dissipation of a harmonic oscillator coupled to a non-equilibrium bath; Wigner-Weisskopf decay and physical spectra

@article{Chaudhuri1998QuantumTO, title={Quantum theory of dissipation of a harmonic oscillator coupled to a non-equilibrium bath; Wigner-Weisskopf decay and physical spectra}, author={Jyotipratim Ray Chaudhuri and Bimalendu Deb and Gautam Gangopadhyay Deb Shankar Ray}, journal={Journal of Physics B}, year={1998}, volume={31}, pages={3859-3874} }

We extend the quantum theory of dissipation in the context of a system-reservoir model, where the reservoir in question is kept in a non-equilibrium condition. Based on a systematic separation of time scales involved in the dynamics, appropriate generalizations of the fluctuation-dissipation and Einstein's relations have been pointed out. We show that the Wigner-Weisskopf decay of the system mode results in a rate constant which, depending on the relaxation of a non-equilibrium bath, is…

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