Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Transport, Quantenkoh
ärenz, Quantenflüssigkeiten

TT 17.24: Poster

Dienstag, 9. März 2004, 14:30–19:00, Poster A

Coherent and incoherent motion in spin-boson systems — •Wolfgang Pfersich and Walter T. Strunz — Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Hermann-Herder-St. 3, 79104 Freiburg, Germany

We investigate the non-Markovian dynamics of the spin-boson system. Our approach is based on ’quantum paths’ widely used in quantum optics.

We use an expansion in the coupling strength for the non-Markovian stochastic Schrödinger equation based on Heisenberg’s equation of motion. We have a special interest in the evolution of the reduced system for short times compared to the correlation time of the bath and the decay of the coherence.

Therefore we solve numerically the second and fourth order equation of motion for the stochastic wave function of the reduced system.