Quantum entanglement and potential wells

Click For Summary

Discussion Overview

The discussion revolves around the concept of quantum entanglement, particularly in the context of electrons within a potential well. Participants explore the relationship between potential wells and the conditions under which electrons can become entangled, as well as the implications of their indistinguishable nature as fermions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether electrons can become entangled specifically in a potential well and seeks clarification on the relationship between potential wells and entanglement.
  • Another participant asserts that entanglement occurs whenever two particles interact, suggesting that proximity in a potential well facilitates this interaction.
  • A different viewpoint claims that electrons are always entangled due to their indistinguishable nature as fermions, leading to antisymmetrized product states rather than product states.
  • A participant expresses confusion regarding the terminology of state vectors and product states, questioning how electrons can be described as antisymmetrized product states if they cannot be in product states at all.
  • One participant emphasizes the necessity of understanding fundamental mathematical concepts to grasp the nature of entanglement.

Areas of Agreement / Disagreement

There is no consensus on the nature of entanglement in relation to potential wells, with differing views on whether electrons can be considered always entangled and the implications of their indistinguishability. The discussion remains unresolved regarding the clarity of the concepts involved.

Contextual Notes

Participants express varying levels of understanding regarding the mathematical framework of quantum mechanics, indicating potential limitations in grasping the concepts discussed. The discussion also reflects uncertainty about the definitions and implications of terms like state vectors and product states.

Who May Find This Useful

This discussion may be of interest to those exploring quantum mechanics, particularly in relation to quantum entanglement and the behavior of fermions.

satyesu
I've read that two electrons can become entangled in a "potential well," which is a point where potential energy is lowest compared to its surroundings. Is this correct? What does this have to do with entangling particles?
 
Physics news on Phys.org
satyesu said:
I've read that two electrons can become entangled in a "potential well," which is a point where potential energy is lowest compared to its surroundings. Is this correct? What does this have to do with entangling particles?
Entanglement happens pretty much whenever two particles interact with one another. Two electrons in a potential well will be close enough to one another to interact, so it's easy to entangle them.
 
Elekctrons are always entangled, because they are indistinguishable fermions, i.e., the state vectors are never product states but antisymmetrized product states,
$$|\Psi \rangle=|\psi_1,\psi_2 \rangle-|\psi_2, \psi_1 \rangle,$$
or superpositions of such antisymmetrized product states.
 
vanhees71 said:
Elekctrons are always entangled, because they are indistinguishable fermions, i.e., the state vectors are never product states but antisymmetrized product states,
$$|\Psi \rangle=|\psi_1,\psi_2 \rangle-|\psi_2, \psi_1 \rangle,$$
or superpositions of such antisymmetrized product states.
Whoa, whoa, whoa. That lingo is above my head so far. What are state vectors and product states, and if e-'s can't be product states at all how can they be "asymmetrized" product states? And, Nugatory, thank you very much.
 
I think my library has that! But I'll probably have to reserve it. Thanks, though!
 
  • Like
Likes   Reactions: vanhees71

Similar threads

  • · Replies 1 ·
Replies
1
Views
373
  • · Replies 7 ·
Replies
7
Views
7K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 27 ·
Replies
27
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 23 ·
Replies
23
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 6 ·
Replies
6
Views
2K