Can Creation and Annihilation Operators Solve the Hydrogen Atom Problem?

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Discussion Overview

The discussion revolves around the possibility of solving the hydrogen atom problem using creation and annihilation operators, similar to methods applied in the harmonic oscillator. Participants explore theoretical implications, references to literature, and practical challenges associated with this approach.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether creation and annihilation operators can be applied to solve the hydrogen atom problem, referencing their effectiveness in the harmonic oscillator.
  • Another participant affirms the possibility and suggests a specific book for further reading, indicating that the book discusses the discrete spectrum.
  • A subsequent reply notes uncertainty regarding the application of similar methods to the continuous spectrum of the hydrogen atom.
  • One participant challenges the notion that the solution is straightforward, emphasizing the complexity and unique properties of the hydrogen atom's Hamiltonian and its relation to algebraic structures like Hermite polynomials and Laguerre functions.
  • Another participant mentions the "supersymmetric method" in relation to the discussion.
  • A separate post shifts focus to a practical application, seeking assistance with visualizing charge density around a hydrogen nucleus using Matlab, indicating a different aspect of the hydrogen atom problem.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility and practicality of using creation and annihilation operators for the hydrogen atom problem. While some support the idea, others highlight significant challenges and complexities, indicating that the discussion remains unresolved.

Contextual Notes

Limitations include the lack of consensus on the applicability of stepping operators to the continuous spectrum and the specific mathematical intricacies involved in the hydrogen atom's Hamiltonian.

crawf_777
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Just a quick question regarding the solution of the hydrogen atom: is it possible to solve the hydrogen atom problem via creation and annihilation operators as is the case with the harmonic oscillator?

Any help here greatly appreciated!

Crawf.
 
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Yes, of course. See the book of D. Fitts: <Principles of Quantum Mechanics - As Applied to Chemistry and Chemical Physics>, from page 161 onwards.
 
Thanks very much for the ref! I'll have a look at said book!
 
The solution provided in the book I mentioned covers only the discrete spectrum. I don't know if a similar analysis has been performed for the continuous spectrum as well.
 
If you think the answer is 'yes of course' let's see you do it for the finite square well!

It's automatic only in the following sense: you have a bunch of states and can always define stepping operators that take you from one state to the next. But as a practical matter, the fact that the hydrogen atom can be solved by the use of stepping operators is far from automatic: it's a miracle!

The Hamiltonian is a quadratic expression in x and p, and the miracle is that this expression can be factored into a product of linear factors. You can explain this as do to the remarkable algebraic properties of Hermite polynomials and Laguerre functions. Or you can ascribe it to 'extra' symmetries, such as the Runge-Lenz vector. But there are very few systems that can be handled this way.
 
It's called "supersymmetric method" if I recall correctly.
 
Thanks for your useful input Bill_K. (and TTB).
 
Visualize charge density

I want to use Matlab to visualize charge density aroud hydrogen nuclear atom. I have had wave function already. Does anyone know how to do it?
Thanks in advance
 

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