Abstract
The Dirac equation is derived in the Foldy-Wouthuysen representation describing the interaction of spin-1/2 relativistic particles with an external electromagnetic field; it is valid in the weak-field approximation. In contrast to previous studies, this equation includes all of the order derivatives of the field potentials. The quantum-mechanical equation is obtained for the spin motion in the Foldy-Wouthuysen representation; it is consistent with the classical Bargmann-Michel-Telegdi equation.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 105, No. 1, pp. 46–54, October, 1995.
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Silenko, A.Y. Dirac equation in the foldy-wouthuysen representation describing the interaction of spin-1/2 relativistic particles with an external electromagnetic field. Theor Math Phys 105, 1224–1230 (1995). https://doi.org/10.1007/BF02067491
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DOI: https://doi.org/10.1007/BF02067491