How to Solve Quantum Mechanics Problems Using Commutation Relations

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This discussion focuses on solving quantum mechanics problems using the commutation relations between the position operator and the Hamiltonian. The participants emphasize the importance of multiplying the left-hand side by the energy denominator and inserting the Hamiltonian operator to utilize the commutator effectively. The commutator of the position operator and Hamiltonian relates to velocity, represented by the product of the imaginary unit i and the reduced Planck's constant (ħ). The discussion concludes with a successful transformation of the position operator into its velocity form.

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I try using the commutation relation of the position operator and the Hamiltonian, but failed.:bugeye::bugeye:

Thanks for your kindly help!
 
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By the way, I don't know how to show the pics directly, sorry about that.
 
Multiply the left hand side by the energy denominator. Insert the hamiltonian operator. The commutator trick should then work.
 
StatMechGuy said:
Multiply the left hand side by the energy denominator. Insert the hamiltonian operator. The commutator trick should then work.


Thanks for your reply.^^ You mean like this?
But it's not the original equation. I know that the commutator of position and Hamiltonian is equal to velocity multiplies by
i and hbar(positive or negative sign added). But what I want to know is how to transform the position operator "itself" into the "velocity form" in the first pic I posted. Or my procedure is simply incorrect?
 

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Ooooooooooops, I got through it, thanks for you help!
You are right! No further questions at all...
 

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