3 ms·
> In QM models, it is a simplification to treat particle as point-like to make the mathematics tractable. It isn't necessarily an accurate picture of the underl
by simiones 3y ago
> In QM models, it is a simplification to treat particle as point-like to make the mathematics tractable. It isn't necessarily an accurate picture of the underlying reality.
As far as I understand, it is more than that: it is an explicit assumption of the theory that elementary particles do not have an internal structure, and so their radius must be 0. This is not to be confused with the wave-like representation, which of course does have a size in space.
On the spin question, I will not claim I understand enough to actually go into more detail than the (probably simplistic) observation I've read that quantum spin can't be understood in terms of classical rotation/movement.