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Research Article Open access CC BY 4.0

On the Significance of Density of an Electrically Charged Quantum Particle

E. Comay

Physical Science International Journal · pp. 1–10 · Published 29 Jan 2018

10.9734/PSIJ/2018/38853

Abstract

Expressions of a conserved 4-current and its density are examined in cases of electrically charged quantum particles. It is proven that the Noether theorem cannot be regarded as a sufficient condition that yields a consistent expression of a conserved 4-current, because electromagnetic interactions pose further constraints. A mathematical analysis shows that the Dirac linear equation yields a consistent expression for a 4-current. In contrast, second order quantum equations, such as the Klein-Gordon equation of an electrically charged scalar particle and the electroweak equation of the W± vector particles do not provide a consistent expression for a conserved 4-current that adequately describes electromagnetic interactions.

Density quantum theories lagrangian function electromagnetic interactions

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