Nonperturbative renormalization group approach to the Ising model:: A derivative expansion at order partial derivative4 -: art. no. 064421

被引：166

作者：

Canet, L

Delamotte, B

Mouhanna, D

Vidal, J

机构：

[1] Univ Paris 06, Lab Phys Theor & Hautes Energies, CNRS UMR 7589, F-75252 Paris 05, France

[2] Univ Paris 07, F-75252 Paris 05, France

[3] Univ Paris 06, Phys Solides Grp, CNRS UMR 7588, F-75251 Paris 05, France

[4] Univ Paris 07, F-75251 Paris 05, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.68.064421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

On the example of the three-dimensional Ising model, we show that nonperturbative renormalization group equations allow one to obtain very accurate critical exponents. Implementing the order partial derivative(4) of the derivative expansion leads to nu=0.632 and to an anomalous dimension eta=0.033 which is significantly improved compared with lower orders calculations.

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