Treating it as a point particle fits with what the universe tells us.
Baloney. You can perform the dual-slit experiment with electrons. It goes through both slits because it's an extended entity. Its field is part of what it is.
Sorry Farsight, they are point particles. Really. Science tells us that treating electrons as point particles matches the physical properties of electrons.
This is kid's stuff. Somebody please put him straight.
Now take a reality check: An ocean wave is not a QM wave. A wave in space has no surface. A macroscopic particle does.
A photon has no surface, and an electron is made from a photon via pair production. It's an extended entity, it's macroscopic, and it has no surface. Even if it was a point particle it would still have no surface.
All scientists sound like "mathematician or a mathematical theoretical physicist". That is because science is based on mathematics which even experimental physicists know.
Sheesh. No. Science is based on the scientific method. Mathematics is just one tool, along with experiment, deduction, prediction, etc. Read
http://en.wikipedia.org/wiki/Experimental_physics to understand the distinction. There's been considerable conflict between experimental physics and theoretical physics. It continues even now.
It is a pity that you cannot understand
the Stern-Gerlach experiment then.
It's a pity you can't understand spinning a globe, holding it by the spin axi, then giving that a spin. It's trivial, and it accounts for the Stern-Gerlach result.
Farsight: underlying spin space is a nothing. It is a mathematical space. Spin space is used to describe QM spin which is also not a "real" as in classical spin. You are confused. I an resorting to science: QM spin is not classical spin.
You're resorting to mysticism whilst rejecting evidence.
I read your post and it is not understandable. So lets turn this into a question: First asked 20 April 2010 Farsight, Please give a complete and understandable explanation of "spinning the spin axis".
Oh come on. Take a sphere, with a steel rod running through the middle, on bearings. Spin the sphere like a globe. Now grab hold of the steel rod, the top end in your left hand, the bottom in your right hand, and rotate your rapidly hands so that your left hand is at the bottom and your right hand is at the top. Now let go. Your spinning sphere is spinning.
Classical spins can have an axis that points an any direction. There are not 2 separate orientations of spin. You can have positive and negative spin around a specific axis.
The "spinning spinning sphere" I described above is classical, but it does not match your criteria.
And back to the Stern-Gerlach experiment :
- Classically a collection of silver atoms in a furnace will have a random distribution of spin orientations and so a random distribution of spin angular momentum vectors.
- Pass this collection of silver atoms through an inhomogeneous magnetic field then the atoms will deflected by random amounts.
- The result expected is that there will be a band of atoms detected.
- The actual result is 2 bands.
Yes you did. And I have never seen a free quark.
Now adjust your prediction for the spinning-spinning sphere. There is no random distribution of spin oritentations, because those spin orientations are spinning.
I agree - wave (quantum) mechanics is not mysticism. It is science. You thinking that I think it is mysticism is totally weird.
Yes, you think it's mystic. So much so that you pretend not to understand the simplest explanation.
But
quantum does not mean "how much". It means... It is derived from the Latin quantus which does mean "how much".
See? It's Quantum Mechanics, not Mystic Mechanics.
So it is not a a real rotation then bacause it does not act like a real rotation. It is a QM rotation that gives a QM angular momentum. It has real effects: a measurable magnetic dipole moment. These are real and clear, within the understanding of any one with an average intelligence, things.
Yes, they're real, and it's a real rotation, RC. Not imaginary, not mystic, and not non-classical.
Sigh. You and I were not and never have been talking about the dual slit experiment. That isn't
the Stern-Gerlach experiment which we have been talking about.
What? You're dismissing the dual slit experiment?
An electron is a treated as a point particle in QM. This leads to a theory that matches the real universe very accurately.
Will somebody tell this guy about QFT please?
If you are going all mystical then you can fantasize about the electron not being a point particle, e.g. it could be really small angels dancing on a really, really small pin head.
It isn't me being mystical here, RC.