Electron in a well: energies are quantized or not?

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SUMMARY

An electron in an infinite potential well exhibits a discrete set of energy levels, contrary to the assumption that an infinite well would lead to a continuous energy density. The discussion clarifies that while a finite well has a limited number of allowed states, an infinite well maintains discrete energy states, resulting in a non-uniform energy state density. The term "addensate," derived from Latin, refers to the concept of increasing density, which is relevant when discussing the distribution of energy states in an infinitely wide well.

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  • Quantum mechanics fundamentals
  • Understanding of potential wells and energy states
  • Familiarity with the concept of density of states
  • Basic calculus for analyzing energy distributions
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  • Study the properties of infinite potential wells in quantum mechanics
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Students and professionals in physics, particularly those focusing on quantum mechanics, as well as educators seeking to clarify concepts related to potential wells and energy distributions.

no_math_plz
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hi, I'm new on this forum, and I don't know english very well (sorry). maybe you can clarify me about this doubt. an electron in a well with infinite walls has a discrete set of energies, right? but if the length of the well is infinite, what can I say about energy state density? is it uniform (as energy state density of a free electron: that's reasonable, as a well of infinite length should simulate this situation), or not? calculus seems to avvalorate this second hypothesis...
 
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A finite well will have a finite number of allowed states associated with it and the energy density will be a series of delta functions.
 
right, but in an infinite well such series becomes a continuous energy density because energy levels addensate: try to imagine...
 
addensate? :confused:
 
no_math_please said:
right, but in an infinite well such series becomes a continuous energy density because energy levels addensate: try to imagine...

The infinite well never has a continuous series of energy states, only discrete states..

I'm with jtbell, "addensate"?
 
I think he's referring to an infinitely wide well, not an infinitely deep one.
 
From the Latin roots, "addensate" should mean "to make more dense". Is your first language Italian, by any chance?
 
yes, addensate=to make more dense! sorry, I thought this word exist in English. I'm referring to an infinitely wide well, not necessarily infinitely deep one: this should represent the free space. the question is: why energies in this case aren't distributed uniformly? for example, in a 3D-infinitely deep well energy density is an increasing function (right, energy states doesn't form a continuous set, but a dense set not uniformly distributed when width is infinite)
 
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