Particle has certain energy levels in a potential well?

Click For Summary

Discussion Overview

The discussion revolves around the energy levels of a particle in a potential well, specifically in the context of the 'Particle in a box' model. Participants explore the implications of quantum mechanics, boundary conditions, and wave-particle duality in relation to energy quantization.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why a particle in a narrow potential well must follow certain energy levels compared to classical systems.
  • Another participant states that the requirement for the particle to obey the Schrödinger equation and boundary conditions leads to quantized energy levels.
  • A different viewpoint suggests that the behavior of particles is influenced by wave-particle duality, indicating that at lower energy states, particles act more like waves.
  • One participant argues that the concept of duality is a human perception and that the particle itself does not conform to everyday experiences, emphasizing the limitations of our metaphors in describing quantum behavior.
  • There is a suggestion that newcomers to quantum mechanics often seek mental frameworks to understand these concepts, which may not fully capture the underlying realities.

Areas of Agreement / Disagreement

Participants express differing views on the interpretation of wave-particle duality and its relevance to understanding energy levels in quantum systems. The discussion remains unresolved regarding the implications of these interpretations.

Contextual Notes

Participants acknowledge the complexity of quantum mechanics and the challenges in reconciling classical intuitions with quantum behavior, highlighting the limitations of existing metaphors.

nickhobbs
In the 'Particle in a box' system, with the well being extremely narrow, why does the particle path have to follow certain energy levels compared to the classical system?

Thanks in advance.
 
Physics news on Phys.org
Hello Nick, :welcome:

That's a direct consequence of 1. It has to obey the Schoedinger equation and 2. there are boundary conditions.

But now the original question shifts to: why does it have to obey the SE ? :smile:

That is Quantum mechanics for you. As the man sings: don't ask why
 
  • Like
Likes   Reactions: nickhobbs
BvU said:
Hello Nick, :welcome:

That's a direct consequence of 1. It has to obey the Schoedinger equation and 2. there are boundary conditions.

But now the original question shifts to: why does it have to obey the SE ? :smile:

That is Quantum mechanics for you. As the man sings: don't ask why

Hi BvU, thanks for your answer! I understand that it has to obey the Schrödinger equation but it is also a consequence of wave-particle duality- and the quantum probability distribution shows it acts more like a wave at lower energy states?
 
The duality you are referring to is our business. The particle has nothing to do with that: it is our perception we want to lean towards something from everyday experience. Little hard spheres or soft water waves to name two extremes. The 'thingy' (electron, photon, baseball, Jupiter) does not act. It is our metaphor for describing its behaviour that is deficient and lures us towards imagining behaviour that is characteristic for phenomena we know from daily life.

And don't worry -- everyone entering this strange world of quantum mechanics is looking for this kind of mental support. After a while you learn to enjoy the astounding power and success of this theory without worrying too much about the 'why' and 'how'.
 
  • Like
Likes   Reactions: nickhobbs
BvU said:
The duality you are referring to is our business. The particle has nothing to do with that: it is our perception we want to lean towards something from everyday experience. Little hard spheres or soft water waves to name two extremes. The 'thingy' (electron, photon, baseball, Jupiter) does not act. It is our metaphor for describing its behaviour that is deficient and lures us towards imagining behaviour that is characteristic for phenomena we know from daily life.

And don't worry -- everyone entering this strange world of quantum mechanics is looking for this kind of mental support. After a while you learn to enjoy the astounding power and success of this theory without worrying too much about the 'why' and 'how'.

Ohh yeah, of course!
Thanks for the help!
 

Similar threads

  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 2 ·
Replies
2
Views
1K