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Lorentz force in Dirac theory and its classical limit
It is well known that in Dirac theory the time derivative of $$P_i=p_i+A_i$$ operator (where $p_i=∂/∂_i$, $A_i$ - EM field vector potential) is an analogue of the Lorentz force:
$$\frac{dP_i}{dt} = e(...
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