How do particles get their spin?

In summary: I guess. In summary, according to Ballentine, the spin of a quantum particle type has everything to do with being a unitary representation of the (quantum) SO(3) group, corresponding to spatial rotations.
  • #36
BadgerBadger92 said:
I mean that particles have their spin, and they don’t spin with it. So what are they doing with it?
I still don't understand what you mean by "doing with it".

BadgerBadger92 said:
Is it just a property of the particle and doesn’t do anything with it?
It is a property of the particle (that was answered way back in post #2), but I still don't understand what "just" and "doesn't do anything with it" mean.
 
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  • #37
PeterDonis said:
I still don't understand what you mean by "doing with it".It is a property of the particle (that was answered way back in post #2), but I still don't understand what "just" and "doesn't do anything with it" mean.
Give me a little bit to figure out how to appropriately ask the question.
 
  • #38
PeterDonis said:
I still don't understand what you mean by "doing with it".
I think OP means "interaction". How does the spin of a particle A influence particle B
 
  • #39
BadgerBadger92 said:
Give me a little bit to figure out how to appropriately ask the question.
Never mind I found the answer
 
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  • #40
malawi_glenn said:
I think OP means "interaction". How does the spin of a particle A influence particle B
I wasn’t asking about that but if you could tell me about that too would be great
 
  • #41
BadgerBadger92 said:
I wasn’t asking about that but if you could tell me about that too would be great
Consider this question then "what do particle do with their electric charge"?
or "what do particle do with their mass"?

Can you answer those? Then maybe we can figure out what you are after.
 
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  • #42
BadgerBadger92 said:
Never mind I found the answer
What is the answer?
 
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  • #43
PeterDonis said:
What is the answer?
They don’t do anything with it, it’s just a characteristic of the particle
 
  • #44
BadgerBadger92 said:
They don’t do anything with it, it’s just a characteristic of the particle
What does "do with it" even mean?
They must "do" something, otherwise we would not know about quantum-spin in the first place (hint: interactions)
 
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  • #45
malawi_glenn said:
What does "do with it" even mean?
They must "do" something, otherwise we would not know about quantum-spin in the first place (hint: interactions)
Heh,... this is like asking "what does a lump of rock do with its hardness?"

Answer 1: "By itself, nothing -- it just sits there quietly. That's why they make good pets."

Answer 2: "In interaction with someone else's head,... well,... that gets more interesting..."
 
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  • #46
BadgerBadger92 said:
They don’t do anything with it, it’s just a characteristic of the particle
And how did you come up with that answer?
 
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  • #49
malawi_glenn said:
You found the answer, in a thread where you asked the same question, one year ago...
And with that, this thread is closed.
 
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