Phase Coherence, Visibility, and the Superfluid-Mott-Insulator Transition on One-Dimensional Optical Lattices
- Department of Physics, University of California, Riverside, California 92521 (United States)
- Physics Department, University of California, Davis, California 95616 (United States)
- Institut Non-Lineaire de Nice, UMR 6618 CNRS, Universite de Nice-Sophia Antipolis, 1361 route des Lucioles, 06560 Valbonne (France)
- Lorentz Institute, Leiden University, P.O. Box 9506, 2300 RA Leiden (Netherlands)
We study the phase coherence and visibility of trapped atomic condensates on one-dimensional optical lattices, by means of quantum Monte Carlo simulations. We obtain structures in the visibility similar to the kinks recently observed experimentally by Gerbier et al. [Phys. Rev. Lett. 95, 050404 (2005); cond-mat/0507087]. We examine these features in detail and offer a connection to the evolution of the density profiles as the depth of the lattice is increased. Our simulations reveal that, as the interaction strength U is increased, the evolution of superfluid and Mott-insulating domains stall for finite intervals of U. The density profiles do not change with increasing U. We show here that in one dimension the visibility provides unequivocal signatures of the melting of Mott domains with densities larger than 1.
- OSTI ID:
- 20699597
- Journal Information:
- Physical Review Letters, Vol. 95, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.95.220402; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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