Renormalization group, dimer-dimer scattering, and three-body forces

被引：13

作者：

Krippa, Boris ^{[1
,2
]}

Walet, Niels R. ^{[2
]}

Birse, Michael C. ^{[2
]}

机构：

[1] Inst Theoret & Expt Phys, Moscow 117259, Russia

[2] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 04期

关键词：

BOSE-EINSTEIN CONDENSATION; FIELD THEORY;

D O I：

10.1103/PhysRevA.81.043628

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for systems of nonrelativistic fermions, using the same functional renormalization technique as previously applied to fermionic matter. We find a strong dependence on the cutoff function used in the renormalization flow for a two-body truncation of the action. Adding a simple three-body term substantially reduces this dependence.

引用

页数：4

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