2013/02/28 by Marco Nava, M. Nava, D. E. Galli +4 · 23 citations
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Atomic and Subatomic Physics Research #High-pressure geophysics and materials #Mathematics #Quantum, superfluid, helium dynamics #cond-mat.other
paper · pdf · doi:10.1103/physrevb.87.144506
published in Physical Review B 87(14) (American Physical Society) · 5 pages, 5 figures
arxiv created 2013/03/11 · openalex publication_date 2013/04/12 · arxiv updated 2015/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 [H. Godfrin et al., Nature 483, 576 (2012)]. Here we address the study of 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.