Article
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Quantum Mechanics and Electromagnetism. Non-Relativistic Theory.
Version 1
: Received: 4 May 2020 / Approved: 5 May 2020 / Online: 5 May 2020 (15:14:06 CEST)
A peer-reviewed article of this Preprint also exists.
Bányai LA, Bundaru M. About Non-relativistic Quantum Mechanics and Electromagnetism. Recent Progress in Materials 2022; 4(4): 027; doi:10.21926/rpm.2204027. Bányai LA, Bundaru M. About Non-relativistic Quantum Mechanics and Electromagnetism. Recent Progress in Materials 2022; 4(4): 027; doi:10.21926/rpm.2204027.
Abstract
We describe here the coherent formulation of electromagnetism in the nonrelativistic quantummechanical many-body theory. We use the mathematical frame of the field theory and its quantization in the spirit of the QED. This is necessary because of the manifold of misinterpretations emerging from the hystorical development of quantum mechanics, starting from the Schrödinger equation of a single particle in the presence of given electromagnetic fields, followed by the many-body theories of many charged identical particles having just Coulomb interactions inspired from the classical electromagnetic theory of point-like charges. However, this later is known to be inconsistent due to the self-interaction. This way could not be continued further to include properly the magnetic forces between the charged particles and lead to a lot of confusion about the interpretation of the magnetic field in the Hamiltonian, as well as about the gauge invariance. We emphasize the importance of the distinction between the applied (external fields) and the field in the matter. All these problems are length properly solved within the non-relativistic QED, nevertheless the confusion dominates in all the problems related to the magnetic properties of the solid state.
Keywords
nonrelativistic QED; many-body theories; Lagrangian; gauge invariance; Coulomb gauge; Hamiltonian; external fields; quantization; 1/c2 approximation; current-current interaction
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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