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Off-diagonal geometric phases for mixed states
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Quantum Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Quantum Chemistry.
2003 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 90, no 5, 050403- p.Article in journal (Refereed) Published
Abstract [en]

We extend the off-diagonal geometric phase [Phys. Rev. Lett. 85, 3067 (2000)] to mixed quantal states. The nodal structure of this phase in the qubit (two-level) case is compared with that of the diagonal mixed state geometric phase [Phys. Rev. Lett. 85, 2845 (2000)]. Extension to higher dimensional Hilbert spaces is delineated. A physical scenario for the off-diagonal mixed state geometric phase in polarization-entangled two-photon interferometry is proposed.

Place, publisher, year, edition, pages
2003. Vol. 90, no 5, 050403- p.
Keyword [en]
Geometric phase, mixed quantum states, quantum interferometry
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:uu:diva-45749DOI: 10.1103/PhysRevLett.90.050403PubMedID: 12633343OAI: oai:DiVA.org:uu-45749DiVA: diva2:73658
Available from: 2006-12-21 Created: 2006-12-21 Last updated: 2017-12-05

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Sjöqvist, Erik

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