Polarization Entangled State Measurement on a Chip
Authors: Sansoni L., Sciarrino F., Vallone G., Mataloni P., Crespi A., Ramponi R., Osellame R.
Autors Affiliation: Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; CNR, INO, I-50125 Florence, Italy; Museo Stor Fis, I-00184 Rome, Italy; Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy; CNR, IFN, I-20133 Milan, Italy; Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy
Abstract: The emerging strategy to overcome the limitations of bulk quantum optics consists of taking advantage of the robustness and compactness achievable by integrated waveguide technology. Here we report the realization of a directional coupler, fabricated by femtosecond laser waveguide writing, acting as an integrated beam splitter able to support polarization-encoded qubits. This maskless and single step technique allows us to realize circular transverse waveguide profiles which are able to support the propagation of Gaussian modes with any polarization state. Using this device, we demonstrate quantum interference with polarization-entangled states and singlet state projection.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 105 (20) Pages from: 200503 to: 200503
More Information: This work was supported by the FARI project, Finanziamento Ateneo 2009 of Sapienza, FIRB-Futuro in Ricerca HYTEQ, and Finanziamento Ateneo 2009 of Politecnico di Milano.DOI: 10.1103/PhysRevLett.105.200503Citations: 160data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-02-23References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here