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American Physical Society, Physical Review Letters, 3(86), p. 369-372, 2001

DOI: 10.1103/physrevlett.86.369

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Geometric Phase of Three-Level Systems in Interferometry

Journal article published in 2001 by Barry C. Sanders, Hubert de Guise, Stephen D. Bartlett ORCID, Hubert de Guise, Weiping Zhang
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This paper is available in a repository.

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Abstract

We present the first scheme for producing and measuring an Abelian geometric phase shift in a three-level system where states are invariant under a non-Abelian group. In contrast to existing experiments and proposals for experiments, based on U(1)-invariant states, our scheme geodesically evolves U(2)-invariant states in a four-dimensional SU(3)/U(2) space and is physically realized via a three-channel optical interferometer. ; Comment: 4 pages, 3 figures