Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 21: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 3 (joint session TT/ DY)

DY 21.3: Vortrag

Dienstag, 17. März 2015, 14:30–14:45, H 3010

Quantum Freezing Effect in 1D SU(N) Hubbard Systems — •Salvatore R. Manmana, Mariya V. Medvedyeva, and Johannes M. Oberreuter — Institut f. Theoretische Physik, Georg-August-Universität Göttingen, D-37077 Göttingen

We investigate the time evolution of SU(N) Fermi-Hubbard systems by releasing initially trapped particles onto an empty lattice. Using the time-dependent DMRG and perturbative approaches, we find that in one spatial dimension for large enough filling and values of N, repulsive interactions cause the dynamics to develop a very strong freezing effect, i.e., on the time scales accessible, particle motion is essentially suppressed. We relate this finding to the quantum distillation effect previously reported for SU(2) Fermi-Hubbard systems and discuss its relevance for ongoing experiments with alkaline earth atom experiments on optical lattices.