Wigner-Eckart theorem
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English[edit]
Etymology[edit]
Named after physicists Eugene Wigner and Carl Eckart.
Proper noun[edit]
- A theorem of representation theory and quantum mechanics, stating that matrix elements of spherical tensor operators on the basis of angular momentum eigenstates can be expressed as the product of two factors, one of which is independent of angular momentum orientation, and the other a Clebsch-Gordan coefficient.