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A Positive-Energy Relativistic Wave Equation. II

P. A. M. Dirac
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 328, No. 1572 (May 2, 1972), pp. 1-7
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/78078
Page Count: 7
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A Positive-Energy Relativistic Wave Equation. II
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Abstract

The wave equation proposed in an earlier paper is examined from the point of view of the Heisenberg picture, for the purpose of getting a physical model. It is found that the position of the particle can roam about over a spherical shell under the influence of a kind of gauge transformation. With the passage of time the shell pulsates. The coordinates of the centre of the shell do not commute. These coordinates provide a reference point for defining orbital angular momentum which leads to zero spin for all momentum values.

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