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arXiv 1208.6080hep-ph
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量子电动力学中光阵面耦合团簇方法的一个例证

An illustration of the light-front coupled-cluster method in quantum electrodynamics

S. S. Chabysheva

摘要:

一个领域理论制定的指数算子技术适用于非微扰哈密顿本征值问题的电动力学,量子化在光前坐标。具体来说,我们考虑缀饰电子态,没有正电子的贡献,但与无限数量的光子,并计算其异常磁矩。一个简单的微扰解立即得到α/2π的Schwinger结果。非微扰解需要数值技术,它将α中所有阶次的修正子集求和,并结合了额外的物理学。

英文摘要:

A field-theoretic formulation of the exponential-operator technique is applied to a nonperturbative Hamiltonian eigenvalue problem in electrodynamics, quantized in light-front coordinates. Specifically, we consider the dressed-electron state, without positron contributions but with an unlimited number of photons, and compute its anomalous magnetic moment. A simple perturbative solution immediately yields the Schwinger result of α/2π. The nonperturbative solution, which requires numerical techniques, sums a subset of corrections to all orders in α and incorporates additional physics.

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