Kinetic energy of liquid and solid 4He

D. M. Ceperley, R. O. Simmons, R. C. Blasdell

Research output: Contribution to journalArticlepeer-review


We report new path-integral calculations and measurements of the kinetic energy of condensed helium and construct an overall dependence of kinetic energy on temperature for densities less than 70 atoms nm-3. In the solid phase we find the kinetic energy is almost temperature independent and, surprisingly, has a smaller kinetic energy than the fluid near freezing at the same density. In the high temperature fluid phase, the excess kinetic energy decreases to zero very slowly because of pair scattering from the repulsive interatomic potential.

Original languageEnglish (US)
Pages (from-to)115-118
Number of pages4
JournalPhysical review letters
Issue number1
StatePublished - 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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