Non-classical neutron beams for fundamental and solid state research

摘要: The curious dual nature of the neutron, sometimes a particle, wave, is wonderfully manifested in various non-local interference and quantum contextuality effects observed neutron interferometry. Non-classical states may become useful for novel fundamental solid state research. Here we discuss unavoidable losses as they appear phase-echo spin rotation experiments show how entanglement single particle system demonstrate contextuality. In all cases interactions, parasitic beams are produced which cannot be recombined completely with original beam. This means that complete reconstruction would, principle, impossible causes kind intrinsic irreversibility. Even small interaction potentials can have huge when applied Zeno-like experiments. Recently, it has been shown an between external internal degrees freedom exists even systems. phenomenon also shows carries much more information than usually extracted. path towards advanced optics will discussed.