2009/11/19 by Cristian Bonato, Stefano Bonora, Andrea Chiuri +4 · 10 citations
Computer Science · Mathematics · Physics and Astronomy · #Adaptive optics #Algorithm #Coincidence #Coincidence counting #Computer science #Deformable mirror #Interferometry #Mathematics #Mechanical and Optical Resonators #Optics #Orbital Angular Momentum in Optics #Path (computing) #Phase (matter) #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #SIGNAL (programming language) #State (computer science) #quant-ph
paper · pdf · doi:10.1364/josab.27.00a175
published in Journal of the Optical Society of America B 27(6), A175 (Optica Publishing Group) · RevTex, 6 pages
arxiv created 2009/11/19 · openalex publication_date 2010/05/14 · arxiv updated 2010/07/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.