Two-mode homodyne tomography of time-encoded single-photon ebits

Year: 2006

Authors: Zavatta A., D’Angelo M., Parigi V., Bellini M.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;
LENS, Via Nello Carrara 1, 50019 Sesto Florentino (FI), Italy;
Department of Physics, University of Florence, 50019 Sesto Florentino (FI), Italy

Abstract: We have developed a technique for dual-temporal-mode, ultrafast, time-domain, balanced homodyne detection. We have tested it by performing homodyne measurements on pairs of picosecond-duration temporal modes (or \”time bins\”) carrying a delocalized single photon. The experimental homodyne data have been used to reconstruct both the density matrix and the two-mode Wigner function of the delocalized state, thus showing the correlations existing between the pair of temporal modes carrying the single photon.

Journal/Review: LASER PHYSICS

Volume: 16 (11)      Pages from: 1501  to: 1507

More Information: Ente Cassa di Risparmio di Firenze. Ministero dell’Istruzione, dell’Università e della Ricerca, MIUR. RBNE01KZ94. – This work was performed in the framework of the “Spettroscopia laser e ottica quantistica” project of the Department of Physics of the University of Florence and was supported in part by Ente Cassa di Risparmio di Firenze and MIUR under the PRIN initiative and FIRB contract RBNE01KZ94.
KeyWords: Data reduction; Encoding (symbols); Functions; Measurement theory; Tomography, Homodyne tomography; Single photons; Time-encoded single-photon ebits; Wigner functions, Photons
DOI: 10.1134/S1054660X06110028

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