Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Quantengase (Fermionen und Gemische)
Q 56.2: Vortrag
Donnerstag, 22. März 2007, 14:15–14:30, 6J
Bloch oscillations of Fermi atoms in a 1D optical lattice — •Alexey Ponomarev1, Andrey Kolovsky1,2, Ming-Chiang Chung1, and Andreas Buchleitner1 — 1Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden — 2Kirensky Institute of Physics, Ru-660036 Krasnoyarsk
We discuss the time dependent response of cold, non-polarized, fermionic atoms loaded in a 1D optical lattice to a static linear potential. Using Floquet-Bloch theory complemented by a perturbative analysis, we explain the dynamical properties of the fermions through the spectral characteristics of the Floquet-Bloch operator. A variety of unexplored dynamical regimes, such as periodic modulations of Bloch oscillations and the doubling of the Bloch frequency are described.