Abstract
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 language | English (US) |
|---|---|
| Article number | 015301 |
| Pages (from-to) | 153011-153014 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 89 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1 2002 |
ASJC Scopus subject areas
- Physics and Astronomy(all)