### Abstract

By solving a microscopically based set of coupled Euler-Lagrange equations we calculate the optimal radial distribution function and the associated optimal Helmholtz free energy for superfluid **4He at non-zero temperatures and given density. The results on the pressure-density relation are discussed and extended to describe the normal phase of **4He, particularly, to determine the gas-liquid critical data.

Original language | English (US) |
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Title of host publication | Unknown Host Publication Title |

Publisher | North-Holland |

Pages | 1209-1210 |

Number of pages | 2 |

Edition | pt 2 |

ISBN (Print) | 0444869107 |

State | Published - Dec 1 1984 |

### Publication series

Name | |
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Number | pt 2 |

## Fingerprint Dive into the research topics of 'VARIATIONAL THEORY OF SUPERFLUID **4He AT POSITIVE TEMPERATURES.'. Together they form a unique fingerprint.

## Cite this

Ristig, M. L., Senger, G., Kuerten, K. E., & Campbell, C. E. (1984). VARIATIONAL THEORY OF SUPERFLUID **4He AT POSITIVE TEMPERATURES. In

*Unknown Host Publication Title*(pt 2 ed., pp. 1209-1210). North-Holland.