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arXiv · 0803.3797

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

I. B. Spielman·W. D. Phillips·J. V. Porto
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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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I. B. Spielman, W. D. Phillips, J. V. Porto. 2008-03-26. Condensate fraction in a 2D Bose gas measured across the Mott-insulator transition. https://doi.org/10.1103/physrevlett.100.120402

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