How Does Angular Dependence Arise in a Spherical Symmetric Potential?

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SUMMARY

The discussion focuses on the dependence of wavefunctions in a spherical symmetric potential, specifically addressing how angular components arise despite the potential depending solely on the radial distance (r). Participants highlight that the wavefunction can be expressed in terms of partial waves that incorporate angular variables such as \(\theta\) and \(\phi\). This phenomenon is likened to the Sommerfeld quantization procedure, which also considers central potentials. The conversation emphasizes the importance of understanding the relationship between standing waves and the geometry of the potential.

PREREQUISITES
  • Spherical symmetric potential in quantum mechanics
  • Wavefunction expansion in terms of partial waves
  • Angular dependence in quantum systems
  • Sommerfeld quantization procedure
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  • Study the mathematical formulation of wavefunctions in spherical coordinates
  • Explore the implications of angular momentum in quantum mechanics
  • Investigate the Sommerfeld quantization condition in detail
  • Learn about the role of boundary conditions in wavefunction behavior
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Quantum mechanics students, physicists studying wavefunctions, and researchers interested in spherical symmetric potentials and their implications in quantum systems.

touqra
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For a spherical symmetric potential, the wavefunction can be expanded in terms of partial waves which is dependent on r and [tex]\theta[/tex]. How would this be possible, when the potential only depends on distance from source? Classically, there's no quantity, that could have depend even on [tex]\theta[/tex].
 
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this is a good question

i also want to know the answer
 
touqra said:
For a spherical symmetric potential, the wavefunction can be expanded in terms of partial waves which is dependent on r and [tex]\theta[/tex]. How would this be possible, when the potential only depends on distance from source? Classically, there's no quantity, that could have depend even on [tex]\theta[/tex].

You are also forgetting [itex]\phi[/itex], the azimuthal angle.

Say you draw a circumference around the central potential. How many "standing waves" can you fit on that circumference, especially if you are allowed only certain wavelengths? Do you think this changes as you increase the radius of the circumference?

What you are solving even for a spherically symmetric potential is similar to that. Even though the potential only depends on r, the angular part of the wavefunction has angular dependence because of what I just mentioned. It is similar to Sommerfled quantization procedure, which also only had a central potential.

Zz.
 

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