EXACT EVOLUTION EQUATION FOR SCALAR ELECTRODYNAMICS

被引：145

作者：

REUTER, M ^{[1
]}

WETTERICH, C ^{[1
]}

机构：

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

来源：

NUCLEAR PHYSICS B | 1994年 / 427卷 / 1-2期

关键词：

D O I：

10.1016/0550-3213(94)90278-X

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 describe scalar quantum electrodynamics by a gauge-invariant effective average action GAMMA(k). This is obtained by integrating out the quantum fluctuations with ''momenta'' larger than k in a gauge-invariant way. Our method can deal successfully with the infrared problems of perturbation theory in less than four dimensions or at high temperature. The dependence of GAMMA(k) on the infrared cutoff k is given by an exact evolution equation.

引用

页码：291 / 324

页数：34

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