Off-diagonal geometric phases for mixed states
2003 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 90, no 5, 050403- p.Article in journal (Refereed) Published
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.
Geometric phase, mixed quantum states, quantum interferometry
Research subject Physics
IdentifiersURN: urn:nbn:se:uu:diva-45749DOI: 10.1103/PhysRevLett.90.050403PubMedID: 12633343OAI: oai:DiVA.org:uu-45749DiVA: diva2:73658