Phys. Rev. Lett. 87, 070401 (2001) [4 pages]Off-Diagonal Geometric Phase in a Neutron Interferometer ExperimentReceived 23 March 2001; published 26 July 2001 Off-diagonal geometric phases acquired by an evolution of a 1/2-spin system have been observed by means of a polarized neutron interferometer. We have successfully measured the off-diagonal phase for noncyclic evolutions even when the diagonal geometric phase is undefined. Our data confirm theoretical predictions and the results illustrate the significance of the off-diagonal phase. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.070401
DOI:
10.1103/PhysRevLett.87.070401
PACS:
03.65.Vf, 03.75.Dg, 07.60.-j, 42.50.-p
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