Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Quantengase (Wechselwirkungseffekte I)

Q 37.9: Talk

Thursday, March 13, 2008, 13:00–13:15, 1C

Dynamics of strongly-correlated bosons in ladder-like optical lattices — •Arturo Argüelles and Luis Santos — Appelstraße 2, 30167 Hannover, Germany

We analyze the physics of strongly-correlated bosons in ladder-like optical lattices out of equlibrium formed by two connected one-dimensional wires. In particular, we investigate Josephson-like oscillations between initially unbalanced wires, and study the effect of the in-wire correlations on the transversal dynamics between the wires. In absence of interactions, the system would perform standard Josephson-like oscillations of the relative population. Due to strong interactions, strong correlations lead to a significant damping of such population oscillations. In our analysis we study by means of matrix-product state techniques the dependence of the damping ratio as a function of the interation regime.