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Observation of Berry’s Geometric Phase by Neutron Interferometry

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Abstract

On the 25th anniversary of Berry’s historic papers on the geometric phase, I discuss here our neutron interferometry experiment in which this phase is clearly separated from the dynamical phase. The connection of this experiment to the observation of the sign reversal of the wave function of a fermion during a 2π precession in a magnetic field by three groups independently in 1975 is discussed.

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  1. Physics Laboratory, NIST, Gaithersburg, MD, 20899, USA

    Sam Werner

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  1. Sam Werner
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Correspondence to Sam Werner.

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Werner, S. Observation of Berry’s Geometric Phase by Neutron Interferometry. Found Phys 42, 122–139 (2012). https://doi.org/10.1007/s10701-010-9526-z

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  • DOI: https://doi.org/10.1007/s10701-010-9526-z

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