Effective-range dependence of resonantly interacting fermions

被引：57

作者：

Forbes, Michael McNeil ^{[1
,2
]}

Gandolfi, Stefano ^{[3
]}

Gezerlis, Alexandros ^{[2
,4
,5
]}

机构：

[1] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[3] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[4] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[5] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW A | 2012年 / 86卷 / 05期

关键词：

Calculations - Fermions - Quantum theory - Electron gas - Equations of state;

D O I：

10.1103/PhysRevA.86.053603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We extract the leading effective-range corrections to the equation of state of the unitary Fermi gas from ab initio fixed-node quantum Monte Carlo (QMC) calculations in a periodic box using a density functional theory (DFT), and show them to be universal by considering several two-body interactions. Furthermore, we find that the DFT is consistent with the best available unbiased QMC calculations, analytic results, and experimental measurements of the equation of state. We also discuss the asymptotic effective-range corrections for trapped systems and present QMC results with the correct asymptotic scaling.

引用

页数：10

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