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Kinematic approach to off-diagonal geometric phases of nondegenerate and degenerate mixed states
Citation
Tong, D. M., Sjöqvist, E., Filipp, S., Kwek, L. C., & Oh, C. H. (2005). Kinematic approach to off-diagonal geometric phases of nondegenerate and degenerate mixed states. Physical Review A, 71(3), Article 032106. https://doi.org/10.1103/PhysRevA.71.032106
Abstract
Off-diagonal geometric phases have been developed in order to provide information of the geometry of paths that connect noninterfering quantal states. We propose a kinematic approach to off-diagonal geometric phases for pure and mixed states. We further extend the mixed-state concept proposed in [Phys. Rev. Lett. 90, 050403 (2003)] to degenerate density operators. The first- and second-order off-diagonal geometric phases are analyzed for unitarily evolving pairs of pseudopure states.
Date Issued
2005
DOI
10.1103/PhysRevA.71.032106