Dynamic structure factor for 3He in two dimensions

被引：20
|
作者：
Nava, M. [1 ]
Galli, D. E. [1 ]
Moroni, S. [2 ,3 ]
Vitali, E. [1 ]
机构：
[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[2] IOM CNR DEMOCRITOS Natl Simulat Ctr, I-34136 Trieste, Italy
[3] SISSA, I-34136 Trieste, Italy
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 14期
关键词：
QUANTUM MONTE-CARLO; GROUND-STATE; PATH-INTEGRALS; SIMULATION;
D O I：
10.1103/PhysRevB.87.144506
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recent neutron scattering experiments on He-3 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. DOI: 10.1103/PhysRevB.87.144506
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页数：5
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