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arXiv:1703.03018 · Journal of Low Temperature Physics

The Momentum Distribution of Liquid $$^4\hbox {He}$$

Timothy R. Prisk, Matthew S. Bryan, Paul E. Sokol, Garrett E. Granroth, Saverio Moroni, Massimo Boninsegni

Published Jul 24, 2017• 13 citations

DOI: 10.1007/s10909-017-1798-7

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The Momentum Distribution of Liquid

^4\hbox {He}

Path-integral methods can be employed to calculate properties of boson systems at any temperature. We have performed a number of simulations of liquid helium and have calculated the momentum distribution as a function of temperature. We find that liquid helium has a condensate below 2 K but not above. The momentum distribution is found to be non-Gaussian even in normal liquid helium. We have also calculated the difference in the momentum distribution between a boson system and a distinguishable particle system.