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TT: Tiefe Temperaturen

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

TT 17.12: Poster

Tuesday, March 9, 2004, 14:30–19:00, Poster A

Transmission Coefficients for Oscillating Barriers — •Mario Fischer, Frank Grossmann und Thomas Kunert — Techn. Univ. Dresden, Inst. f. Theor. Physik, 01062 Dresden

Hamiltonians with localized oscillating potentials serve as model systems for break junctions and lead-molecule-lead systems in laser fields. Because for this class of Hamiltonians energy is not conserved and absorption resp. emission of photons occurs, the definition of transmission coefficients is not straightforward. For those Hamiltonians a new numerical approach to define and calculate transmission coefficients is presented. By perfoming a limited amount of wave packet propagations the transmission coefficients for all interesting energies and photon exchange numbers can be obtained. Using this approach basic phenoma as the rectification of current through molecules [ 1 ] can be examined.
J. Lehmann, S. Kohler, P. Hänggi, J. Chem. Phys. 118, 3283 (2002)