Exploring the Quantum Harmonic Oscillator: Eigenstates and Energies

In summary, the conversation is discussing the determination of eigenstates and energies for the Hamiltonian H=\frac{p^2}{2M}+\frac{1}{2}\omega^2r^2-\omega_z L_z. It is mentioned that the eigenstates are represented by \psi(r) and the energies are solutions for E. The problem is three-dimensional and the wave function will involve spherical coordinates. The method of converting L_z and p to spherical coordinates and separating variables is suggested, similar to the H-atom case or the isotropic 3D oscillator.
  • #1
atomicpedals
209
7

Homework Statement



Consider the Hamiltonian

[tex]H=\frac{p^2}{2M}+\frac{1}{2}\omega^2r^2-\omega_z L_z[/tex]

Determine its eigenstates and energies.

2. The attempt at a solution

I want to check my comprehension; by eigenstate they mean

[tex]\psi(r)[/tex]
from the good old

[tex]H\psi(r)=E\psi(r)[/tex]
and then the energies would then be solutions for E?
 
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  • #2
To sort of answer my own question the eigenstates would more properly probably be
[tex]|\psi>[/tex]
in
[tex]H|\psi>=E|\psi>[/tex]
 
  • #3
It's a three-dimensional problem, so the wave function will be a function of r, θ, and φ.
 
  • #4
Ah, right. (and just as I was getting comfortable in 2D)
 
  • #5
Convert L_z and p to spherical coordinates and separate variables just like in the H-atom case, or the isotropic 3D oscillator.
 

FAQ: Exploring the Quantum Harmonic Oscillator: Eigenstates and Energies

What is a Quantum Harmonic Oscillator?

A Quantum Harmonic Oscillator is a model used in quantum mechanics to describe the behavior of a particle in a potential energy well. It is an idealized system that consists of a particle moving back and forth in a potential energy field, similar to a mass attached to a spring in classical mechanics.

How is a Quantum Harmonic Oscillator different from a classical Harmonic Oscillator?

Unlike a classical Harmonic Oscillator, a Quantum Harmonic Oscillator takes into account the principles of quantum mechanics, such as the Heisenberg uncertainty principle and quantization of energy levels. This means that the energy of the oscillator is not continuous, but rather it can only exist in specific discrete energy levels.

What is the significance of the energy levels in a Quantum Harmonic Oscillator?

The energy levels in a Quantum Harmonic Oscillator represent the allowed states that the particle can occupy. The lowest energy level, or ground state, has the lowest energy and highest probability of being occupied by the particle. As the energy levels increase, the energy and probability decrease, meaning it is less likely for the particle to be in those higher energy states.

How is the Quantum Harmonic Oscillator used in real-world applications?

The Quantum Harmonic Oscillator has many practical applications, such as in spectroscopy, where it is used to analyze the energy levels of molecules, and in quantum computing, where it is used as a qubit to store and manipulate information. It is also used in the study of condensed matter physics and to model the behavior of electrons in materials.

Can the Quantum Harmonic Oscillator be solved exactly?

Yes, the Quantum Harmonic Oscillator can be solved exactly using mathematical techniques such as the Schrödinger equation or the ladder operator method. This allows for the determination of the energy levels and wavefunctions of the oscillator, providing valuable insights into the behavior of quantum systems.

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