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Response of liquid 3He at finite temperatures
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The random-phase-approximation (RPA) dynamical response of liquid
3
He
at finite temperatures has been calculated using an effective density-dependent atom-atom interaction. The interaction contains a zero-range part of Skyrme type, supplemented by a weighted density approximation to account for short-range correlations, and a long-range effective interaction of Lennard-Jones type. The calculated zero-sound and paramagnon energy centroids agree reasonably with data, and the calculated strength exhibits a negative energy tail extending up to -0.5 meV, also in good agreement with existing data. We have found that opposite to what happens with zero sound, within RPA the paramagnon peak is rather insensitive to thermal broadening.
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BARRANCO GÓMEZ, Manuel, HERNÁNDEZ, E. Susana and NAVARRO FAUS, Jesús. Response of liquid 3He at finite temperatures. Physical Review B. 1996. Vol. 54, num. 10, pags. 7394-7400. ISSN 0163-1829. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/10445