.Solving [X,H] for the SHO Hamiltonian

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The discussion focuses on solving the commutation relation [X, H] for the simple harmonic oscillator Hamiltonian H. The key insight is that one does not need to use any representation, but rather the expression of H in terms of position X and momentum P, along with the identity XP - PX = k. The hint provided suggests utilizing the commutator property [A, BC] = B[A, C] + [A, B]C to simplify the calculation, particularly for the [x, p^2] component.

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Ratzinger
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[x, H]= ??

Given the Hamilton operator for the simple harmonic oscilator H, how do I get to [X, H]= ih(P/ m)? I put X in momentum representation, but then I can't get rid of these diff operators. mmh?

thanks in advance
 
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You don't need to use any representation at all -- just the expression of H in terms of X and P, and the identity XP - PX=k. (I forget what k is. *sigh*)
 
Last edited:
You don't need to use differential operators - you can work it out using commutators.

Hint:

[A , BC] = B[A , C] + [A , B]C.

Uses this on the [x , p^2] part.

Regards,
George
 

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