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
Phase control of a path-entangled photon state by a deformable membrane mirror / Cristian, Bonato; Stefano, Bonora; Chiuri, Andrea; Mataloni, Paolo; Milani, Giorgio; Vallone, Giuseppe; Paolo, Villoresi. - In: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS. - ISSN 0740-3224. - 27:6(2010), pp. A175-A180. [10.1364/josab.27.00a175]
Phase control of a path-entangled photon state by a deformable membrane mirror
CHIURI, ANDREA;MATALONI, Paolo;MILANI, Giorgio;VALLONE, GIUSEPPE;
2010
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 AmericaI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
