Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 13: Quantum Chaos
DY 13.17: Vortrag
Freitag, 4. März 2005, 18:15–18:30, TU H2032
Dynamics of systems coupled to finite markovian environments: Deviations from standard quantum master equation results — •Jochen Gemmer1 and Mathias Michel2 — 1Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück — 2Universität Stuttgart, Institut für Theoretische Physik I, Pfaffenwaldring 57, 70550 Stuttgart
We investigate few level quantum systems coupled to environments which are specified only by their energy spectra. For environments featuring a finite but large enough number of eigenstates to represent markovian systems, we find local system dynamics that deviate from what Nakajima-Zwanzig type quantum master equations produce. We compare results from the Nakajima-Zwanzig method, the Hilbertspace average method and present exact numerical solutions for the corresponding Schrödinger equations.