Quantum Mechanics Solution Manual |
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© Leon van Dommelen |
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4.5.1.1 Solution commutea-a
Question:
The pointer state
is one of the eigenstates that , , and have in common. Check that it is not an eigenstate that , , and have in common.
Answer:
It is an eigenstate of and , but not of . Since the angular momentum of a state is , the combination above has a 50%/50% probability that the angular momentum is or .