CRITICAL EXPONENTS FROM THE EFFECTIVE AVERAGE ACTION

被引：287

作者：

TETRADIS, N ^{[1
]}

WETTERICH, C ^{[1
]}

机构：

[1] UNIV HEIDELBERG, INST THEORET PHYS, D-69120 HEIDELBERG, GERMANY

来源：

NUCLEAR PHYSICS B | 1994年 / 422卷 / 03期

关键词：

D O I：

10.1016/0550-3213(94)90446-4

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：

We compute the critical behaviour of three-dimensional scalar theories using a new exact non-perturbative evolution equation. Our values for the critical exponents and other universal constants agree well with previous precision estimates. The evolution equation describes the scale dependence of the effective average action (coarse-grained effective action). It is not restricted to critical phenomena and can be used in the presence of massless (Goldstone) modes dealing successfully with the infrared problems. Our results establish the viability of our method for precise computations in a non-perturbative context.

引用

页码：541 / 592

页数：52

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