Wigner function and coherence properties of cold and thermal neutrons

Details Wigner function and coherence properties of cold and thermal neutrons Wigner function and coherence properties of cold and thermal neutrons

1999-04-26

arxiv.org/abs/quant-ph/9904086v1

Acta Phys.Slov. 49 (1999) 677-682

Physics

Quantum Physics

6 pages, 3 figures. Contribution to the Sixth Central-European Workshop on Quantum Optics, Chudobin near Olomouc, Czech Republ

Scientific paper

We analyze the coherence properties of a cold or a thermal neutron by utilizing the Wigner quasidistribution function. We look in particular at a recent experiment performed by Badurek {\em et al.}, in which a polarized neutron crosses a magnetic field that is orthogonal to its spin, producing highly non-classical states. The quantal coherence is extremely sensitive to the field fluctuation at high neutron momenta. A "decoherence parameter" is introduced in order to get quantitative estimates of the losses of coherence.

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