Spin in Classical and Quantum Theory
- 15 March 1961
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 121 (6) , 1833-1839
- https://doi.org/10.1103/physrev.121.1833
Abstract
The classical equations of motion of a charged point-particle with intrinsic spin under the influence of an external electromagnetic field are restated and compared with the Heisenberg equations of motion derived from the Dirac theory. The partition of angular momentum between particle and field in the classical theory is contrasted to the Dirac theory of electron spin. The analogy between the Dirac equation and the theory of parametric amplification is pointed out.Keywords
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