Resilience to decoherence of the macroscopic quantum superpositions generated by universally covariant optimal quantum cloning
Year: 2010
Authors: Spagnolo N., Sciarrino F., De Martini F.
Autors Affiliation: Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; Consorzio Interuniv Sci Fis Materia, I-00185 Rome, Italy; Ist Nazl Ottica, I-50125 Florence, Italy; Accademia Nazl Lincei, I-00165 Rome, Italy.
Abstract: We show that the quantum states generated by universal optimal quantum cloning of a single photon represent a universal set of quantum superpositions resilient to decoherence. We adopt the Bures distance as a tool to investigate the persistence of quantum coherence of these quantum states. According to this analysis, the process of universal cloning realizes a class of quantum superpositions that exhibits a covariance property in lossy configuration over the complete set of polarization states in the Bloch sphere.
Journal/Review: PHYSICAL REVIEW A
Volume: 82 (3) Pages from: 32325-1 to: 32325-7
More Information: We acknowledge support by the Futuro in Ricerca Project HYTEQ, and Progetto d’Ateneo of Sapienza Universita di Roma.KeyWords: State; Cloning; Optimization; Quantum optics; SpheresDOI: 10.1103/PhysRevA.82.032325ImpactFactor: 2.861Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here
