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arXiv · 1302.1799

Dynamic structure factor for 3He in two-dimensions

M. Nava·D. E. Galli·S. Moroni·E. Vitali
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Abstract

Recent neutron scattering experiments on 3He films have observed a zero-sound mode, its dispersion relation and its merging with -and possibly emerging from- the particle-hole continuum. Here we address the study of the excitations in the system via quantum Monte Carlo methods: we suggest a practical scheme to calculate imaginary time correlation functions for moderate-size fermionic systems. Combined with an efficient method for analytic continuation, this scheme affords an extremely convincing description of the experimental findings.

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M. Nava, D. E. Galli, S. Moroni, E. Vitali. 2013-02-07. Dynamic structure factor for 3He in two-dimensions. https://doi.org/10.1103/physrevb.87.144506

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