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arXiv 1012.1063physics.class-ph
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洛仑兹规范势能被认为是物理量吗？

Can the Lorenz-gauge potentials be considered physical quantities?

Jose A. Heras, Guillermo Fernandez-Anaya

备注：
12 pages
发表信息：
Eur. J. Phys. 31, 307-315 (2010)
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摘要：

两个结果支持洛伦兹规范中的标量势和矢量势可以被认为是物理量的观点：（i）它们分别满足因果关系和光速传播的性质，并且不意味着虚假项;（ii）它们可以自然地写成明显协变的形式。本文介绍了用延迟时间的电场和磁场表示的当前时间的洛伦兹规范势。这些表达式提供了有利于洛伦兹规范势的物理解释的第三个结果：（iii）它们可以被视为观测到的电场和磁场的因果效应。

英文摘要：

Two results support the idea that the scalar and vector potentials in the Lorenz gauge can be considered to be physical quantities: (i) they separately satisfy the properties of causality and propagation at the speed of light and not imply spurious terms and (ii) they can naturally be written in a manifestly covariant form. In this paper we introduce expressions for the Lorenz-gauge potentials at the present time in terms of electric and magnetic fields at the retarded time. These expressions provide a third result in favor of a physical interpretation of the Lorenz-gauge potentials: (iii) they can be regarded as causal effects of the observed electric and magnetic fields.

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