Probability interpretation question

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Discussion Overview

The discussion revolves around the interpretation of a specific quantum mechanical formula involving wave functions and their relation to the probability of finding particles at given coordinates and spins. The scope includes conceptual clarification and technical explanation regarding the nature of probabilities in quantum systems, particularly with respect to entangled particles.

Discussion Character

  • Conceptual clarification, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions whether the formula represents the probability of finding a particle in a set of coordinates with a specific spin or just the probability of finding particles at those coordinates and spins.
  • Another participant asserts that the first interpretation makes more sense based on the notation used.
  • A third participant provides an interpretation found online, suggesting that the formula indicates the probability for N particles at specific coordinates and spins, raising a question about the applicability to single particles.
  • A subsequent reply notes that the interpretation may depend on whether the particles are entangled, as entanglement complicates the separation of wave functions for individual particles.
  • Further discussion reveals a participant's confusion regarding the subtlety between two interpretations of the probability statement, prompting clarification on whether there is a meaningful difference.
  • One participant concludes that they do not see a difference between the two interpretations, suggesting that each variable corresponds to a different particle.

Areas of Agreement / Disagreement

Participants express differing views on the interpretation of the formula, with some asserting clarity in the first interpretation while others question the distinction between two proposed interpretations. The discussion remains unresolved regarding the nuances of these interpretations.

Contextual Notes

The discussion highlights the complexity of interpreting quantum probabilities, particularly in systems with multiple entangled particles. There are unresolved aspects regarding the implications of entanglement on the interpretation of the wave function.

arierreF
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If a have the following formula

ψ*(r1,...rn,σ1,...σn)ψ(r1,...rn,σ1,...σn)

how can interpret it?


the probability of finding a particle in a set of coordinates r1,...rn, with spin σ1,...σn or

the probability of finding a particle in a set of coordinates r1,...rn,σ1,...σn ?

I know that this is a stupid question...
 
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I would say the first. The second would make no sense from the notation.
 
I googled it and i found that

ψ*(r1,...rn,σ1,...σn)ψ(r1,...rn,σ1,...σn) is the probability that the N particles are at a particular set of coordinates r1,...rn , with a particular spin σ1,...σn.

So we can not find the prob. for one particle? Just for the N particles?
 
Last edited:
I guess that depends how many particles are in the system and whether they are entangled or not. If they are entangled you won't be able to separate the wave-function out for a single particle.
 
Ok, but I am still not understanding something.

Considering that the N particle are entangled,

My thought:
probability that the N particles are at coordinates r1,...rn , with spin σ1,...σn.

Google answer:
probability that the N particles are at a particular set of coordinates r1,...rn , with a particular spin σ1,...σn.

what is the difference?
 
I don't think there is any difference. Each n will refer to a different particle. Sorry if I am not understanding the confusion properly.
 
Ok i got it.

Thanks for the help.
 

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