量子电动力学平均场近似中的无束缚
Absence of binding in a mean-field approximation of quantum electrodynamics
摘要:
我们研究了Bogoliubov-Dirac-Fock模型,它是QED的平均场近似。它允许考虑与狄拉克海相互作用的相对论电子。我们研究了真空中的两个电子系统:在以前的工作中已经表明,在一些技术假设下,由于真空极化,只有一个电子可以结合。在这里,我们证明了两个电子的系统没有绑定:真空的响应不足以抵消电子的排斥。
英文摘要:
We study the Bogoliubov-Dirac-Fock model which is a mean-field approximation of QED. It allows to consider relativistic electrons interacting with the Dirac sea. We study the system of two electrons in the vacuum: it has been shown in a previous work that an electron alone can bind due to the vacuum polarization, under some technical assumptions. Here we prove the absence of binding for the system of two electrons: the response of the vacuum is not sufficient to counterbalance the repulsion of the electrons.
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