Exact BRS Symmetry Realized along the Renormalization Group Flow
Exact BRS Symmetry Realized along the Renormalization Group Flow
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沿着重正化群流实现精确的 BRS 对称性
DOI：
10.1143/ptp.104.1053
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发表时间：
2000
影响因子：
--
通讯作者：
H. So
中科院分区：
文献类型：
--
作者：
Y. Igarashi;K. Itoh;H. So
利用块自旋变换的连续模拟定义的平均作用量，我们证明了规范对称性沿着威尔逊重整化群流的存在。作为规范对称性的反映，平均作用量满足量子主方程（QME）。我们表明，一旦考虑到BRS变换下的测量贡献，主方程的量子部分是自然理解的。此外，一个有效的BRS变换作用于宏观场可以定义从QME。的平均行动明确评估鞍点近似到一个循环的顺序。证实了该作用满足QME和流动方程。
Using the average action defined with a continuum analog of the block spin transformation, we show the presence of gauge symmetry along the Wilsonian renormalization group flow. As a reflection of the gauge symmetry, the average action satisfies the quantum master equation(QME). We show that the quantum part of the master equation is naturally understood once the measure contribution under the BRS transformation is taken into account. Furthermore an effective BRS transformation acting on macroscopic fields may be defined from the QME. The average action is explicitly evaluated in terms of the saddle point approximation up to one-loop order. It is confirmed that the action satisfies the QME and the flow equation.