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Dynamic structure factor for 3He in two dimensions
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DOI：10.1103/PhysRevB.87.144506.png)
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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
Keyword:
QUANTUM MONTE-CARLO
GROUND-STATE
PATH-INTEGRALS
SIMULATION
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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