.Solving [X,H] for the SHO Hamiltonian

In summary, to get to [X, H]= ih(P/ m), you can use the expression of H in terms of X and P, as well as the identity XP - PX=k and the commutator formula [A , BC] = B[A , C] + [A , B]C. This will help you solve for [X, H] without having to use any specific representation or differential operators.
  • #1
Ratzinger
291
0
[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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  • #2
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:
  • #3
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
 

Related to .Solving [X,H] for the SHO Hamiltonian

1. What is the SHO Hamiltonian?

The SHO Hamiltonian, or Simple Harmonic Oscillator Hamiltonian, is a mathematical representation of a system that undergoes simple harmonic motion. It is commonly used in physics and engineering to describe systems such as a mass attached to a spring.

2. What does [X,H] mean in the context of the SHO Hamiltonian?

[X,H] refers to the commutator of the position operator, X, and the Hamiltonian operator, H. In simple terms, it represents the difference between applying the position operator before and after applying the Hamiltonian operator.

3. How do you solve [X,H] for the SHO Hamiltonian?

The solution for [X,H] involves using the mathematical properties of the commutator, such as the Jacobi identity, to simplify the expression. This can then be applied to the equations of motion for the SHO Hamiltonian to solve for the position and momentum of the system.

4. What is the significance of solving [X,H] for the SHO Hamiltonian?

Solving [X,H] allows for a better understanding and analysis of the dynamics of a simple harmonic oscillator system. It can also be used to derive important equations, such as the Heisenberg uncertainty principle, which have wide applications in quantum mechanics.

5. Are there any real-world applications of solving [X,H] for the SHO Hamiltonian?

Yes, the SHO Hamiltonian is commonly used in various fields such as physics, engineering, and chemistry. It has applications in understanding the behavior of physical systems, designing mechanical systems, and predicting chemical reactions. It is also an important concept in quantum mechanics and plays a crucial role in understanding the behavior of subatomic particles.

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