Observation of off-diagonal geometric phase in polarized neutron interferometer experiments

Details Observation of off-diagonal geometric phase in polarized neutron interferometer experiments Observation of off-diagonal geometric phase in polarized neutron interferometer experiments

2002-01-14

arxiv.org/abs/quant-ph/0201054v2

Phys. Rev. A 65, 052111 (2002)

Physics

Quantum Physics

pdf, 22 pages + 8 figures (included in the pdf). In print on Phys. Rev. A

Scientific paper

10.1103/PhysRevA.65.052111

Off-diagonal geometric phases acquired in the evolution of a spin-1/2 system have been investigated by means of a polarized neutron interferometer. Final counts with and without polarization analysis enable us to observe simultaneously the off-diagonal and diagonal geometric phases in two detectors. We have quantitatively measured the off-diagonal geometric phase for noncyclic evolutions, confirming the theoretical predictions. We discuss the significance of our experiment in terms of geometric phases (both diagonal and off-diagonal) and in terms of the quantum erasing phenomenon.

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