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arXiv math-ph/0507043math-phmath.MP
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非相对论量子电动力学中的重整化电子质量

The Renormalized Electron Mass in Non-Relativistic Quantum Electrodynamics

Volker Bach, Thomas Chen, Juerg Froehlich, Israel Michael Sigal

摘要:

本文研究了非相对论QED中标量电子的红外质量重整化问题。我们假设电子与量子化电磁场的相互作用包括一个固定的紫外正则化和一个由$σ>0$参数化的红外正则化。对于电子和光子场的守恒总动量$p=0$,建立了在$σ\to0$中一致的重整化质量的界,并证明了存在一个基态.当$|p|>0$足够小时,对于任何固定的$σ>0$,导出了重整化质量的界.我们的证明的一个关键组成部分是算子理论的重整化群使用等谱光滑Feshbach映射。它提供了一个明确的,有限的算法,确定重整化电子质量在$p=0$到任何给定的精度。

英文摘要:

This work addresses the problem of infrared mass renormalization for a scalar electron in a translation-invariant model of non-relativistic QED. We assume that the interaction of the electron with the quantized electromagnetic field comprises a fixed ultraviolet regularization and an infrared regularization parametrized by $σ>0$. For the value $p=0$ of the conserved total momentum of electron and photon field, bounds on the renormalized mass are established which are uniform in $σ\to0$, and the existence of a ground state is proved. For $|p|>0$ sufficiently small, bounds on the renormalized mass are derived for any fixed $σ>0$. A key ingredient of our proofs is the operator-theoretic renormalization group using the isospectral smooth Feshbach map. It provides an explicit, finite algorithm that determines the renormalized electron mass at $p=0$ to any given precision.

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