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Quantum Mechanics Help: general form of <x|a|x'>?
What is the most general form of <x|a|x'> if the operator a
(a) commutes with the position operator x
(b) commutes with the momentum operator p
(c) commutes with both x and p
1 AnswerPhysics9 years agoQuantum Mechanics Help: Spin-1/2?
Spin-1/2 particle is in the state |psi> = alpha|↑> + beta|↓>.
a. Calculate <Sx>, <Sy>, <Sz>
b. Show that <Sx>^2 + <Sy>^2 + <Sz>^2 = 1/4
2 AnswersPhysics9 years ago