Berlin 2014 – scientific programme
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A: Fachverband Atomphysik
A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)
A 34.6: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
Quenching effects in one-dimensional few body ensembles — •Simeon Mistakidis1, Lushuai Cao1,2, and Peter Schmelcher1,2 — 1Zentrum fur Optische Quantentechnologien, Universitat Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Universitat Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
Non-equilibrium aspects of few-boson systems in one-dimensional finite lattices are investigated. Starting from the Superfluid regime we drive non-perturbatively the few-body system by sudden interaction quenches. Employing the numerically exact ab-initio Multi-Layer Multi-Configuration time-dependent Hartree method for bosons permits us to realize non-equilibrium simulations. Focussing on the low-lying collective modes of the finite lattice we observe the emergence of tunneling, breathing and dipole processes. In particular the interaction quenches couple the tunneling and dipole modes yielding in this manner resonant phenomena. Finally,complementing the numerical studies an Effective Hamiltonian in terms of the Fock states is derived.