On the mode-coupling treatment of collective density fluctuations for quantum liquids: Para-hydrogen and normal liquid helium

Orly Kletenik-Edelman, David R. Reichman, Eran Rabani

Research output: Contribution to journalArticlepeer-review

Abstract

A novel quantum mode coupling theory combined with a kinetic approach is developed for the description of collective density fluctuations in quantum liquids characterized by Boltzmann statistics. Three mode-coupling approximations are presented and applied to study the dynamic response of para-hydrogen near the triple point and normal liquid helium above the -transition. The theory is compared with experimental results and to the exact imaginary time data generated by path integral Monte Carlo simulations. While for liquid para-hydrogen the combination of kinetic and quantum mode-coupling theory provides semi-quantitative results for both short and long time dynamics, it fails for normal liquid helium. A discussion of this failure based on the ideal gas limit is presented.

Original languageEnglish
Article number044528
JournalJournal of Chemical Physics
Volume134
Issue number4
DOIs
StatePublished - 28 Jan 2011

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