Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 34: TR: Quantum Coherence and Quantum Information Systems 2 (jointly with MA and HL)

TT 34.5: Talk

Wednesday, March 16, 2011, 15:00–15:15, HSZ 03

Dissipative Landau-Zener Transitions at High Temperatures — •Peter Nalbach and Michael Thorwart — I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany

We study Landau-Zener transitions in a dissipative environment including excitation survival probability [1,2] by a numerically exact approach. Competition between relaxation and the external driving results in nonmonotonic behaviour of the ocupation probabilities which we explain in terms of an appealing phenomenological model. We furthermore show that the nonmonotonic behaviour survives up to very high temperatures where so far monotonic behaviour due to dominant dephasing was expected.
P. Nalbach and M. Thorwart, Phys. Rev. Lett. 103, 220401 (2009)
P. Nalbach and M. Thorwart, Chem. Phys. 375, 234 (2010)