Normal state of highly polarized Fermi gases: Full many-body treatment

被引：136

作者：

Combescot, R. ^{[1
]}

Giraud, S. ^{[1
]}

机构：

[1] Ecole Normale Super, Lab Phys Stat, F-75231 Paris 05, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 05期

关键词：

Electron gas;

D O I：

10.1103/PhysRevLett.101.050404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a single down arrow atom within a Fermi sea of up arrow atoms. We elucidate by a full many-body analysis the quite mysterious agreement between Monte Carlo results and approximate calculations taking only into account single particle-hole excitations. It results from a nearly perfect destructive interference of the contributions of states with more than one particle-hole pair. This is linked to the remarkable efficiency of the expansion in powers of hole wave vectors, the lowest order leading to perfect interference. Going up to two particle-hole pairs gives an essentially perfect agreement with known exact results. Hence our treatment amounts to an exact solution of this problem.

引用

页数：4

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