Kinematic approach to off-diagonal geometric phases of nondegenerate and degenerate mixed states
2005 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 71, no 3, 032106- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2005. Vol. 71, no 3, 032106- p.
Geometric phase, mixed quantumm states
Research subject Physics
IdentifiersURN: urn:nbn:se:uu:diva-73761DOI: 10.1103/PhysRevA.71.032106OAI: oai:DiVA.org:uu-73761DiVA: diva2:101671