The QM phase of a single particle traveling freely in 3 dimensions is ((adsbygoogle = window.adsbygoogle || []).push({}); r•p– Et), whererandpare the 3-D position and momentum vectors. This is also the dot product of the space-time four-vector (r,-t) with the Energy-Momentum four-vector (p,E)

Is this "coincidence" related to relativistic QM?

Thanks in advance.

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# QM Phase & Four-Vectors

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