In physics, quantum spin is a mathematical construct that explains what elementary particles do. But like quantum waves, it is said to be imaginary, so when electrons spin, nothing actually spins. After all, in current physics, an electron is a point particle that has no size, so it can’t spin. And if it had a size, its edges would have to move faster than light to explain the observed effects. The logic is that quantum spin isn’t real because it is physically impossible, just as quantum waves can’t really spread and collapse because that is physically impossible too.
But if a photon is a processing wave, quantum spin can be that process rotating. This section explores the possibility that light not only spreads in all directions but also spins in all directions. Physical realism doesn’t allow this but quantum realism does.
QR3.7.1. The Curious Case of Quantum Spin
QR3.7.2. Quantum Directions
QR3.7.3. Polarization