Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Ultracold atoms and BEC - IV (with A)
Q 39.7: Vortrag
Mittwoch, 8. März 2017, 16:00–16:15, N 1
Multipulse interaction quenched ultracold few-bosonic ensembles in finite optical lattices — •Simeon Mistakidis1, Jannis Neuhaus-Steinmetz1, and Peter Schmelcher1,2 — 1Zentrum fuer Optische Quantentechnologien, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
The correlated non-equilibrium dynamics following a multipulse interaction quench protocol in few-bosonic ensembles confined in finite optical lattices is investigated. The multipulse interaction quench gives rise to the cradle and a global breathing mode, which are generated during the interaction pulse and persist also after the pulse. The tunneling dynamics consists of several channels accompanying the dynamics. The majority of the tunneling channels persist after the pulse, while only a few occur during the pulse. The induced excitation dynamics is also explored and a strong non-linear dependence on the delayed time of the multipulse protocol is observed. Moreover, the character of the excitation dynamics is also manifested by the periodic population of higher-lying lattice momenta. To solve the underlying many-body Schroedinger equation we employ the Multi Configuration Time-Dependent Hartree method for Bosons (MCTDHB) which is especially designed to treat the out-of-equilibrium quantum dynamics of interacting bosons beyond the mean field and linear response approximations. The above mentioned findings pave the way for future investigations on the direct control of the excitation dynamics.