Bose-Einstein Condensation at a Helium Surface

Details Bose-Einstein Condensation at a Helium Surface Bose-Einstein Condensation at a Helium Surface

2002-01-25

arxiv.org/abs/cond-mat/0201477v1

Physics

Condensed Matter

8 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.89.015301

Path Integral Monte Carlo was used to calculate the Bose-Einstein condensate fraction at the surface of a helium film at $T=0.77 K$, as a function of density. Moving from the center of the slab to the surface, the condensate fraction was found to initially increase with decreasing density to a maximum value of 0.9 before decreasing. Long wavelength density correlations were observed in the static structure factor at the surface of the slab. Finally, a surface dispersion relation was calculated from imaginary-time density-density correlations.

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