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.
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页数：7
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