Geometric phase in neutron interferometer experiments

Yuji Hasegawa

doi:10.1117/12.475883

22 July 2002 Geometric phase in neutron interferometer experiments

Yuji Hasegawa

Proceedings Volume 4888, First International Workshop on Classical and Quantum Interference; (2002) https://doi.org/10.1117/12.475883
Event: First International Workshop of Research Center for Optics on Classical and Quantum Interference, 2001, Olomouc, Czech Republic

Abstract

Neutron interferometer experiments have served as elegant demonstrations of the foundations of quantum mechanics. We show here two interferometer-experiments: one is the demonstration of a geometric phase in a split-beam experiment and the other is the measurement of off-diagonal geometric phase acquired in an evolution of a 1/2-spin system. The former was accomplished with the use of a two-loop neutron interferometer, where a reference beam can be added to the beam from one interference ioop. The combination of phase shifters and partial absorbers permitted the compensation of the dynamical phase and measurement of the geometric phase. The latter is investigated by means of a polarized neutron interferometer. Final counts with and without the polarization analysis enabled us to observe both the off-diagonal and diagonal geometric phases in two detectors. All experimental results show complete agreement with theoretical treatments.

Citation Download Citation

Yuji Hasegawa "Geometric phase in neutron interferometer experiments", Proc. SPIE 4888, First International Workshop on Classical and Quantum Interference, (22 July 2002); https://doi.org/10.1117/12.475883

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