Field Theory Commutators

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Abstract

It is customary to assert that the electric charge density of a Dirac field commutes with the current density at equal times, since the current vector is a gauge-invariant bilinear combination of the Dirac fields. It follows from the conservation of charge that the charge density and its time derivative, referring to any pair of spatial points at a common time, are commutative. (W.D.M.)

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Cite This Study

Julian Schwinger (Tue,) studied this question.

synapsesocial.com/papers/6a0f4e0a426db18b04ed14b0 https://doi.org/https://doi.org/10.1103/physrevlett.3.296

Discussion

Journals

Physical Review Letters

Institutions

Harvard University Press

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