Phys Rev Lett. 2003 Aug 22;91(8):080403. doi: 10.1103/PhysRevLett.91.080403. Epub 2003 Aug 19.

Atomic Bose and Anderson glasses in optical lattices.

Physical review letters

B Damski, J Zakrzewski, L Santos, P Zoller, M Lewenstein

PMID: 14525226 DOI: 10.1103/PhysRevLett.91.080403

Abstract

An ultracold atomic Bose gas in an optical lattice is shown to provide an ideal system for the controlled analysis of disordered Bose lattice gases. This goal may be easily achieved under the current experimental conditions by introducing a pseudorandom potential created by a second additional lattice or, alternatively, by placing a speckle pattern on the main lattice. We show that, for a noncommensurable filling factor, in the strong-interaction limit, a controlled growing of the disorder drives a dynamical transition from superfluid to Bose-glass phase. Similarly, in the weak interaction limit, a dynamical transition from superfluid to Anderson-glass phase may be observed. In both regimes, we show that even very low-intensity disorder-inducing lasers cause large modifications of the superfluid fraction of the system.

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• Journal Article