Dissipative quantum systems modeled by a two level reservoir coupling

Details Dissipative quantum systems modeled by a two level reservoir coupling Dissipative quantum systems modeled by a two level reservoir coupling

1993-08-31

arxiv.org/abs/cond-mat/9308038v1

Physics

Condensed Matter

6 pages, RevteX, preprint UNICAMP

Scientific paper

10.1103/PhysRevB.48.13974

The coupling between a quantum dynamical system and a two-level system reservoir is analysed within the framework of the Feynman-Vernon theory. We stress the differences between this new reservoir and the well-known bath of oscillators and show that, in order to obtain the Langevin equation for the system of interest in the high temperature regime, we have to choose a spectral distribution function $J(\omega)$ which is finite for $\omega=0$.

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