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      Condensate fraction in a 2D Bose gas measured across the Mott-insulator transition

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          Abstract

          We realize a single-band 2D Bose-Hubbard system with Rb atoms in an optical lattice and measure the condensate fraction as a function of lattice depth, crossing from the superfluid to the Mott-insulating phase. We quantitatively identify the location of the superfluid to normal transition by observing when the condensed fraction vanishes. Our measurement agrees with recent quantum Monte Carlo calculations for a finite-sized 2D system to within experimental uncertainty.

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          Journal
          26 March 2008
          Article
          10.1103/PhysRevLett.100.120402
          0803.3797
          be7fb9b8-0d4d-4a1a-99a0-c2f611c34115

          http://creativecommons.org/licenses/publicdomain/

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          Custom metadata
          Phys. Rev. Lett., 100, 120402 (2008)
          4 pages, 3 figures
          cond-mat.other

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