Supersymmetry in the problem of an electron in a nonuniform magnetic field
Gendenshtein L. E.
The Pauli and Dirac equations for an electron are super-symmetric in an arbitrary two-dimensional magnetic field. The vacuum can be degenerate with respect to an infinite-dimensional representation of a group which is not the symmetry group of the Hamiltonian. Supersymmetry also occurs in a three-dimensional field with a certain parity. The parity plays the role of the fermion charge in this case.