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Results tagged with momentum
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user 41152
In introductory mechanics, the momentum of a particle is its mass times its velocity. In electrodynamics, the momentum of a field is proportional to the cross-product of the electric field with the magnetic field. In special relativity, momentum is generalized to four-momentum.
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$p^4$ in radial coordinates not Hermitian
Griffiths' quantum textbook claims in question 6.15 that "$p^2$ is Hermitian, but $p^4$ is not, for hydrogen states with $l=0$."
First off, I am puzzled at his use of terminology. An operator is e …
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