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

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

2008-03-26

arxiv.org/abs/0803.3797v1

Phys. Rev. Lett., 100, 120402 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.120402

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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