Calculation of universal amplitude ratios in three-loop order

被引：28

作者：

Gutsfeld, C ^{[1
]}

Kuster, J ^{[1
]}

Munster, G ^{[1
]}

机构：

[1] UNIV MUNSTER,INST THEORET PHYS 1,D-48149 MUNSTER,GERMANY

来源：

NUCLEAR PHYSICS B | 1996年 / 479卷 / 03期

关键词：

critical phenomena; field theory; Ising model; amplitude ratios;

D O I：

10.1016/0550-3213(96)00424-5

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

For the universality class of three-dimensional Ising systems the ratio of the high- and low-temperature amplitudes for the correlation length and for the susceptibility are universal quantities. They can be calculated by renormalized perturbation theory for scalar phi(4) theory in fixed dimensions D = 3 in the symmetric phase and in the phase of broken symmetry. In this article the amplitude ratios are calculated in the three-loop approximation. Using the fixed point values of the coupling constants we obtain f(+)/f(-) = 2.013(28) and C-+/C-- = 4.72(17).

引用

页码：654 / 662

页数：9

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