NEUTRON QUANTUM OPTICS

Neutron interferometry experiments are described in terms of quantum o ptics. Several aspects of interferometry are discussed in relation to the wave-particle behaviour and to measuring problem of quantum mechan ics. It is shown that a previously performed double resonance experime nt can be interpreted as a magnetic analogue of the superconducting Jo sephson effect. Partial beam path detection experiments show a smooth transition between an interference (wave) and a path (particle) measur ing process. Spectral filtering before and behind the interferometer c an restore the interference pattern even in cases where the wave train s are shifted inside the interferometer more than the coherence length s.