Wednesday, February 1, 2012

1201.6674 (Stefan S. Natu et al.)

Dynamics of correlations in shallow optical lattices    [PDF]

Stefan S. Natu, Erich J. Mueller
We explore how correlations evolve in a gas of lattice bosons when the
lattice depth is rapidly reduced. We find a simple closed form expression for
the static structure factor in the limit of vanishing interactions. The
corresponding real-space density correlation function shows multiple spatial
oscillations which linearly disperse as a function of time. By perturbatively
including the effects of the interactions we calculate how the boson
quasi-momentum evolves following the quench.
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