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Czechoslovak Journal of Physics

Off-diagonal geometric phase in polarized neutron interferometry

Yuji Hasegawa, G. Badurek, H. Rauch, Rudolf Loidl, Matthias Baron

Published Mar 1, 2002• 0 citations
Publisher
DOI
10.1007/s10582-002-0166-1

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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.

arXiv:quant-ph/0201054•Physical Review A•Apr 24, 2002•37 citations
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.