Neutron phase echo
- 1 November 1991
- journal article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 44 (9), 5357-5368
- https://doi.org/10.1103/physreva.44.5357
Abstract
The coherent overlap of the waves traversing the two legs of a perfect-crystal neutron interferometer is altered by a material with a neutron-nuclear optical potential. The fringe visibility is limited by the longitudinal coherence length. The loss of interference contrast caused by a slab of material of positive optical potential can be restored by placing another slab of material with a negative optical potential in the same leg of the interferometer. This paper describes the observation and detailed characterization of this quantum-mechanical phenomenon, which we call the phase-echo effect.Keywords
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