- #1
Andre' Quanta
- 34
- 0
During a course of QFT my teacher said that in this theory is not possible to use the operator X for the position in order to construct with the momentum P and the spin S a set of irreducible operators that charachterize particles, and that we need a different point of wiev: the irreducible unitary rappresentations of the Poincare Group?
Why is this true? Why i can' t use the operator X, P and S in QFT to describe particles as in the normal Q.M.?
Why is this true? Why i can' t use the operator X, P and S in QFT to describe particles as in the normal Q.M.?