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arXiv 2203.05313hep-thmath-phmath.MP
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规范理论中形变问题的广义正则方法

Generalized canonical approach to deformation problem in gauge theories

I. L. Buchbinder, P. M. Lavrov

AI总结:

本研究基于BFV形式体系提出规范理论形变问题的广义正则方法,通过含特殊生成函数的超正则变换得到通解,并以阿贝尔到非阿贝尔规范理论的形变验证了方法有效性。

摘要:

我们提出了一种构建形变的通用方法,该方法可将相空间中任意具有不可约第一类约束的动力学系统映射为另一个具有第一类约束的动力学系统。研究表明,这类形变问题可在Batalin-Fradkin-Vilkovisky(BFV,巴塔林-弗拉德金-维尔科夫斯基)形式体系的框架下得到有效探究。该形式体系的基本对象是BRST-BFV荷与广义哈密顿量,二者在扩展相空间中通过(超)泊松括号满足定义方程。我们借助含特殊生成函数的(超)正则变换,得到了形变问题的通解,且该生成函数已被显式构造出来。研究证明,该生成函数由仅依赖于初始动力学系统坐标的单个任意函数确定。原则上,该函数可以是非局域的,但形变后的理论可存在一个局域扇区。为验证所提出的方法,我们构造了阿贝尔规范理论到非局域非阿贝尔规范理论的非局域形变,其局域扇区与标准Yang-Mills(杨-米尔斯)理论完全一致。

英文摘要:

We develop a general approach to constructing a deformation that describes the mapping of any dynamical system with irreducible first-class constraints in the phase space into another dynamical system with first-class constraints. It is shown that such a deformation problem can be efficiently explored in the framework of the Batalin-Fradkin-Vilkovisky (BFV) formalism. The basic objects of this formalism are the BRST-BFV charge and a generalized Hamiltonian that satisfy the defining equations in the extended phase space in terms of (super)Poisson brackets. General solution to the deformation problem is found in terms of a (super)canonical transformation with a special generating function which is explicitly established. It is proved that this generating function is determined by a single arbitrary function which depends only on coordinates of initial dynamical system. In principle, such a function may be non-local, but the deformed theory may have a local sector. To illustrate the developed approach, we have constructed a non-local deformation of the Abelian gauge theory into a non-local non-Abelian gauge theory whose local sector coincides with the standard Yang-Mills theory.

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