Exact renormalization group and many-fermion systems

被引：4

作者：

Krippa, B ^{[1
]}

Birse, MC

McGovern, JA

Walet, NR

机构：

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

[2] Univ Manchester, Dept Phys, Manchester M60 1QD, Lancs, England

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2005年 / 20卷 / 2-3期

关键词：

superfluidity; pairing; renormalization group; phase transition;

D O I：

10.1142/S0217751X05021889

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The exact renormalization group method is applied to many-fermion systems with short-range attractive forces. The strength of the attractive fermion-fermion interaction is determined from the vacuum scattering length. A set of approximate flow equations is derived including fermionic bosonic fluctations. The numerical solutions show a phase transition to a gapped phase. The inclusion of bosonic fluctuations is found to be significant only in the small-gap regime.

引用

页码：596 / 598

页数：3

共 6 条

[1] Non-perturbative renormalization flow in quantum field theory and statistical physics [J].

Berges, J ;

Tetradis, N ;

Wetterich, C .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2002, 363 (4-6) :223-386

[2]

BIRSE MC, HEPPH0406249, P12701

[3] Local energy-density functional approach to many-body nuclear systems with S-wave pairing [J].

Fayans, SA ;

Zawischa, D .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2001, 15 (10-11) :1684-1702

[4] Off-shell effects and consistency of many-body treatments of dense matter [J].

Krippa, B ;

Birse, MC ;

McGovern, JA ;

Walet, NR .

PHYSICAL REVIEW C, 2003, 67 (03) :313011-313015

[5] Evolution from BCS superconductivity to Bose condensation: analytic results for the crossover in three dimensions [J].

Marini, M ;

Pistolesi, F ;

Strinati, GC .

EUROPEAN PHYSICAL JOURNAL B, 1998, 1 (02) :151-159

[6]

Wilson K. G., 1974, Physics Reports. Physics Letters Section C, V12c, P75, DOI 10.1016/0370-1573(74)90023-4

← 1 →