Find Eigenvalues: Physics Forums Homework Help

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This thread, https://www.physicsforums.com/showthread.php?t=74810, was orignally posted here in the QM forum, but it was moved to the homework section, which is reasonable. But nobody there knows quantum mechanics. I guess the OP gave up on it, but I'm curious how to do the problem now. So if somebody could take a look at it that would be cool. I guess you should reply in the homework section and not to this post directly.

thanks
 
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HackaB said:
This thread, https://www.physicsforums.com/showthread.php?t=74810, was orignally posted here in the QM forum, but it was moved to the homework section, which is reasonable. But nobody there knows quantum mechanics.

What do you mean that nobody there knows quantum mechanics?

There were several responses, and from what I've seen, I certainly cannot say that those responders did not know QM.

The problem isn't easy due to the projection operator as its potential. You need someone willing to grind it out to work through this. It has nothing to do with people not knowing QM. Almost everyone who reads this section also read the Homework section.

Zz.
 
I'm giving my best shot.So far,i think that the potential doesn't have physical states.

Daniel.


EDIT:I'll take a break.Apparently,there's something wrong with the LaTex.I'll resume posting later on.
 
Last edited:
ZapperZ said:
What do you mean that nobody there knows quantum mechanics?

There were several responses, and from what I've seen, I certainly cannot say that those responders did not know QM.

The problem isn't easy due to the projection operator as its potential. You need someone willing to grind it out to work through this. It has nothing to do with people not knowing QM. Almost everyone who reads this section also read the Homework section.

Zz.

My mistake. Thanks everyone :)
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!
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