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arXiv 2203.09296math-phmath.MP
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场演算:没有费曼图的量子和统计场论

Field Calculus: Quantum and Statistical Field Theory without the Feynman Diagrams

John E. Gough

摘要:

对于给定的基空间$M$(时空),我们考虑$M$上的Guichardet空间上的Guichardet空间。在这里,我们开发了一个基于Guichardet积分的“场演算”。这是描述玻色子系统的格林函数关系的自然设置。在这里,我们可以遵循施温格的建议,发展一种微分(局部场)方法,而不是费曼开创的积分方法。DEFG(Dyson-Einstein-Feynman-Guichardet)速记法大大简化了表达式。这为Schwinger和Tomonaga的正式方法提供了一个方便的框架,而不是Feynman图。戴森-施温格在玻色子创造/湮灭算子的帮助下用这种语言重铸。我们还给出了树展开的组合方法。

英文摘要:

For a given base space $M$ (spacetime), we consider the Guichardet space over the Guichardet space over $M$. Here we develop a ''field calculus'' based on the Guichardet integral. This is the natural setting in which to describe Green function relations for Boson systems. Here we can follow the suggestion of Schwinger and develop a differential (local field) approach rather than the integral one pioneered by Feynman. This is helped by a DEFG (Dyson-Einstein-Feynman-Guichardet) shorthand which greatly simplifies expressions. This gives a convenient framework for the formal approach of Schwinger and Tomonaga as opposed to Feynman diagrams. The Dyson-Schwinger is recast in this language with the help of bosonic creation/annihilation operators. We also give the combinatorial approach to tree-expansions.

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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