are these different quantum mechanically?(adsbygoogle = window.adsbygoogle || []).push({});

I thought they were the same since probability current density obeys the continuity equation as the electric current density must also.

prob. current density: ~ psi* grad psi - psi grad psi*

electric current density ~ <psi| p |psi>

are they the same?

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# Probability current versus electric current

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