NEUTRON INTERFEROMETRY WITH ANTIPHASE MODULATION

It is shown that under certain circumstances, interference effects are expected in a neutron interferometer containing choppers rotating in antiphase which leave at most one path open at any time. This phenomenon is similar to the "phase echo" effect in neutron interferometry. It is also the analogue for massive de Broglie waves of a (classical) optical low-intensity interference experiment performed by Sillitto and Wykes in 1972, a more stringent version of which has recently been proposed by Zukowski et al. The feasibility of demonstrating such neutron interference with currently available technology is discussed.