- Is there a way to translate a particle's spin into regular motion?
Is there a way to translate a quantum particle's spin into regular motion in any of the directions?
That would be the famous Stern-Gerlach experiment, as described in post #6.I think I phrased the question somewhat poorly. My bad. What I meant to ask was whether or not there is a known mechanism that could differentiate between two values of given spin, say up or down, and subsequently, "translate," that either value of spin into a corresponding direction in motion.
Meaning, reverse a Stern-Gerlach experiment? In principle, yes, it would be possible, but the practical difficulties would be very great. You would have to redirect both output beams from one Stern-Gerlach device back into a second device in such a way that they recombined.Is there a way to do the reverse?
The term "convert" is not a good term to use to describe what devices like beam splitters and polarizers (for photons) and Stern Gerlach magnets (for electrons) do. They don't "convert" linear momentum into polarization/spin, or vice versa; the magnitude of both the linear momentum and the spin of the particle is the same after going through the device as before.this Mach-Zehnder interferometer would be able to convert momentum into polarization?
That's what a Stern-Gerlach device does, yes: it has an inhomogeneous magnetic field that splits the input beam into two output beams, one for spin up and one for spin down.By bends the electron, I'm assuming you mean that it would just accelerate the electron one way for one spin value, and a correspondingly opposite way for the opposite spin value?
No. I already explained what it does do: it recombines two input beams into one output beam, assuming the two input beams have opposite spin values (one is spin up and one is spin down) because they were produced by a previous Stern-Gerlach device operating in the "forward" direction.And the reverse process "translates" (Sorry, can't think of a better term) direction of momentum into spin?