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Frankfurt 2006 – scientific programme

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A: Atomphysik

A 6: Ultrakalte Atomphysik II: Dynamik mit Bose-Einstein Kondensaten

A 6.3: Talk

Tuesday, March 14, 2006, 14:45–15:00, H6

Atomic current across an optical lattice — •Alexey Ponomarev1,2, Javier Madronero1,3, Andrey Kolovsky1,2, and Andreas Buchleitner11Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden — 2Kirensky Institute of Physics, Ru-660036 Krasnoyarsk — 3Physik Department, Technische Universität München, James-Franck-Straße, D-85747 Garching

We devise a microscopic model for the emergence of a collision-induced, fermionic atomic current across a tilted optical lattice. Tuning the – experimentally controlable – parameters of the microscopic dynamics allows to switch from Ohmic to negative differential conductance. We show that relevant parameters can be calculated using the theory of (a)diabatic transitions between instanteneous eigenstates of a time-dependent Hamiltonian.

[1] A. V. Ponomarev, J. Madronero, A. R. Kolovsky, A. Buchleitner, cond-mat/0509602

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