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arXiv 2209.08736math-phmath.MPmath.SG
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一阶Hamilton经典场论的一个新的正则仿射BRACKET形式

A new canonical affine BRACKET formulation of Hamiltonian Classical Field theories of first order

François Gay-balmaz, Juan C. Marrero, Nicolás Martínez

摘要:

如何将经典力学的正则Poisson括号形式以一种完全普遍的、内禀的、正则的方式推广到经典场论,是一个长期存在的问题。本文通过给出一个新的完全正则的一阶哈密顿经典场论的括号形式,给出了这个问题的答案。它是通过构造哈密顿向量场和观测量空间的适当场论类似物,通过在电流空间(场论中的观测量)上引入适当的正则李代数结构而得到的。这种李代数结构示出有一个表示仿射空间的哈密顿部分,这产生了仿射类似的雅可比身份,我们的括号。的建设是类似于规范的泊松制定的哈密顿系统,虽然我们制定的性质是线性仿射,而不是双线性的标准泊松括号。这与电流空间和哈密顿截面分别是线性和仿射的事实是一致的。我们的设置说明了一些例子,包括连续介质力学和杨米尔斯理论。

英文摘要:

It has been a long standing question how to extend the canonical Poisson bracket formulation from classical mechanics to classical field theories, in a completely general, intrinsic, and canonical way. In this paper, we provide an answer to this question by presenting a new completely canonical bracket formulation of Hamiltonian Classical Field Theories of first order on an arbitrary configuration bundle. It is obtained via the construction of the appropriate field-theoretic analogues of the Hamiltonian vector field and of the space of observables, via the introduction of a suitable canonical Lie algebra structure on the space of currents (the observables in field theories). This Lie algebra structure is shown to have a representation on the affine space of Hamiltonian sections, which yields an affine analogue to the Jacobi identity for our bracket. The construction is analogous to the canonical Poisson formulation of Hamiltonian systems although the nature of our formulation is linear-affine and not bilinear as the standard Poisson bracket. This is consistent with the fact that the space of currents and Hamiltonian sections are respectively, linear and affine. Our setting is illustrated with some examples including Continuum Mechanics and Yang-Mills theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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