Convergence of a renormalization-group approach to dimer-dimer scattering

被引：12

作者：

Birse, Michael C. ^{[1
]}

Krippa, Boris ^{[1
,2
]}

Walet, Niels R. ^{[1
]}

机构：

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

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

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 02期

关键词：

BOSE-EINSTEIN CONDENSATION; FIELD THEORY;

D O I：

10.1103/PhysRevA.83.023621

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the convergence of a functional renormalization group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with known exact results.

引用

页数：7

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