Spin segregation of nonrelativistic charged particles by a helical magnetic field slab.
We study a beam of nonrelativistic spin-$\frac{1}{2}$ charge carriers incident normally on a finite slab of helical magnetic field aligned along the beam axis. Starting from the Pauli--Schrödinger equation, we apply a unitary transformation expressed in terms of Pauli matrices to map the system to a spatially independe...