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A closer look at the quantum Langevin equation: Fokker-Planck equation and quasiprobabilities

✍ Scribed by P. Schramm; R. Jung; H. Grabert

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
238 KB
Volume
107
Category
Article
ISSN
0375-9601

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Starting from a forward-backward path integral of a point particle in a bath of harmonic oscillators, we derive the Fokker-Planck and Langevin equations with and without inertia. Special emphasis is placed upon the correct operator order in the time evolution operator. The crucial step is the evalua