Exact c-number representation of non-Markovian quantum dissipation.
The reduced dynamics of a quantum system interacting with a linear heat bath finds an exact representation in terms of a stochastic Schrödinger equation. All memory effects of the reservoir are transformed into noise correlations and mean-field friction. The classical limit of the resulting stochastic dynamics is shown to be a generalized Langevin equation, and conventional quantum state diffusion is recovered in the Born-Markov approximation. The non-Markovian exact dynamics, valid at arbitrary temperature and damping strength, is exemplified by an application to the dissipative two-state system.
Stockburger
Jürgen T
JT
Fakultät für Physik, Albert-Ludwigs-Universität, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany.
Grabert
Hermann
H