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A: Fachverband Atomphysik

A 9: Ultracold atoms I (jointly with Q)

A 9.6: Vortrag

Dienstag, 11. März 2008, 15:15–15:30, 2F

Correlation dynamics of strongly-correlated lattice bosons out of equilibrium — •Karen Rodriguez and Luis Santos — Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover

We analyze by means of matrix product states techniques the dynamics of strongly-correlated Bose gases in a finite one-dimensional optical lattice after a change of the lattice parameters within the superfluid region. We analyze different regimes of perturbation, which range from adiabatic to non-adiabatic. In particular, we are interested in the evolution of different correlations in the system in time, showing that the different correlations present different time scales in their reaction to the change of parameters. As a consequence, when local quantities are converged correlation to distant neighbours or the quasi-condensate fraction may still present a significant dynamics. In addition, the different time scales for different correlations open the possibility to have different criteria for adiabaticity in the system.