Helium at nonzero temperatures: A variational density-matrix approach for Bose fluids

G. Senger, M. L. Ristig, K. E. K̈rten, C. E. Campbell

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

A variational statistical mechanics of boson quantum fluids such as He4 is developed as a natural generalization of the Jastrow Euler-Lagrange method which has been successfully applied to the ground-state problem. The results include a quantitative description of the liquid-gas portion of the phase diagram, including the corresponding critical point and spinodal line. Also calculated is the temperature dependence of the liquid structure function and phonon-roton spectrum within the class of trial density matrices explored in this work.

Original languageEnglish (US)
Pages (from-to)7562-7574
Number of pages13
JournalPhysical Review B
Volume33
Issue number11
DOIs
StatePublished - 1986

Bibliographical note

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Copyright 2015 Elsevier B.V., All rights reserved.

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