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arXiv math-ph/0702070math-phmath.MP
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关于有效量子场论的表示

On the representation of effective quantum field theories

Andreas Raab

摘要:

我们讨论有效的量子场论(QFT),其中包括例如量子色动力学和量子电动力学的一般模型。我们假设在模型中的拉格朗日函数的微扰展开相对于一个截止能量参数。对于每一个订单的扩展,我们严格推导出一个表示,这是酉等价的非相互作用近似的有效QFT的表示。我们解释的各种表示为不同的粒子图片,相对于有效的QFT可以描述。我们进一步导出了严格的散射理论,它精确地再现了量子场论中形式散射理论的结果。

英文摘要:

We discuss a general model for effective quantum field theories (QFTs), which for example comprises quantum chromodynamics and quantum electrodynamics. We assume in the model a perturbative expansion of the Lagrangian with respect to a cut-off-energy parameter. For each order in the expansion we rigorously derive a representation, which is unitarily equivalent to the representation of the effective QFT in the non-interaction approximation. We interpret the various representations as different particle pictures with respect to which the effective QFT can be described. We further derive a rigorous scattering theory, which exactly reproduces results of formal scattering theory in quantum field 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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