3 ms·
> if you swap two fermions, the state of the universe has its phase shifted 180 degrees Do you mean there are two kinds? Or if you swap any two?
by raldi 7y ago
> if you swap two fermions, the state of the universe has its phase shifted 180 degrees
Do you mean there are two kinds? Or if you swap any two?
- amluto 7y agoSwap any two. This is why two fermions can’t be in the same state: if you swapped them, you’d be back where you started, but that somehow also had to phase shift 180 degrees, and the only complex amplitude that is the same as its own negation is zero.