Scientific Results

Phase control of a path-entangled photon state by a deformable membrane mirror

Year: 2010

Authors: Bonato C., Bonora S., Chiuri A., Mataloni P., Milani G., Vallone G., Villoresi P.

Autors Affiliation: CNR-INFM LUXOR, Department of Information Engineering, University of Padova, Padova, Italy; Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, the Netherlands; Dipartimento di Fisica, Università Sapienza di Roma, Piazzale Aldo Moro 5, Roma 00185, Italy; CNR – Istituto Nazionale di Ottica Applicata, L.go E. Fermi 6, 50125 Florence, Italy; Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Via Panisperna 89/A, Compendio del Viminale, Roma 00184, Italy

Abstract: We demonstrate the potentialities of a deformable mirror for closed-loop control of a two-photon path-entangled state subject to phase fluctuations. A custom-made membrane mirror is used to set a relative phase shift between the arms of an interferometric apparatus. The control algorithm estimates the phase of the quantum state by measurements of the coincidence events at the output ports of the interferometer and uses the measurement results to provide a feedback signal to the deformable mirror. Stabilization of the coincidence rate to within 1.5 standard deviation of the Poissonian noise is demonstrated over 2000 s. (C) 2010 Optical Society of America


Volume: 27 (6)      Pages from: A175  to: A180

More Information: This work was partially supported by Strategic-Research Project QUANTUMFUTURE of the University of Padova.
DOI: 10.1364/JOSAB.27.00A175

Citations: 6
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