Bose-Einstein condensation at a helium surface

E. W. Draeger, D. M. Ceperley

Research output: Contribution to journalArticlepeer-review


The density-density correlation functions and the condensate fraction at the surface of liquid 4He were calculated using a path integral Monte Carlo method. Imaginary-time correlation functions were used to calculate the dispersion relation of surface excitations in a free helium surface. Results indicated that condensate fraction increased with decreased density, to a maximum value of 0.9, due to decreased zero-point motion from helium-helium interactions.

Original languageEnglish (US)
Article number015301
Pages (from-to)153011-153014
Number of pages4
JournalPhysical review letters
Issue number1
StatePublished - Jul 1 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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