Spin-Orbit States of Neutron Wavepackets
  We propose a method to prepare an entangled spin-orbit state between the spin and the orbital angular momenta of a neutron wavepacket. This spin-orbit state is created by passing neutrons through the center of a quadrupole magnetic field, which provides a coupling between the spin and orbital degrees of freedom. A Ramsey fringe type measurement is suggested as a means of verifying the spin-orbit correlations. 
Joachim Nsofini, Dusan Sarenac, Christopher J. Wood, David G. Cory,   Muhammad Arif, Charles W. Clark, Michael G. Huber, Dmi...
quant-ph nucl-ex physics.optics