Print Email Facebook Twitter Quantum nondemolition measurement of optical field fluctuations by optomechanical interaction Title Quantum nondemolition measurement of optical field fluctuations by optomechanical interaction Author Pontin, A. (University of Florence; Istituto Nazionale di Fisica Nucleare - Sezione di Firenze; University College London (UCL)) Bonaldi, M. (Fondazione Bruno Kessler; Trento Institute for Fundamental Physics and Application) Borrielli, A. (Fondazione Bruno Kessler; Trento Institute for Fundamental Physics and Application) Marconi, L. (CNR-INO) Marino, F. (CNR-INO; Istituto Nazionale di Fisica Nucleare - Sezione di Firenze) Pandraud, G. (TU Delft Else Kooi Laboratory; TU Delft EKL Processing) Prodi, G.A. (Università di Trento; Trento Institute for Fundamental Physics and Application) Sarro, Pasqualina M (TU Delft Electronic Components, Technology and Materials; TU Delft Else Kooi Laboratory) Serra, E. (TU Delft Electronic Components, Technology and Materials; TU Delft Else Kooi Laboratory; Trento Institute for Fundamental Physics and Application) Marin, F. (University of Florence; CNR-INO; Istituto Nazionale di Fisica Nucleare - Sezione di Firenze; European Laboratory for Non-linear Spectroscopy (LENS)) Department Else Kooi Laboratory Date 2018 Abstract According to quantum mechanics, if we keep observing a continuous variable we generally disturb its evolution. For a class of observables, however, it is possible to implement a so-called quantum nondemolition measurement: by confining the perturbation to the conjugate variable, the observable is estimated with arbitrary accuracy, or prepared in a well-known state. For instance, when the light bounces on a movable mirror, its intensity is not perturbed (the effect is just seen on the phase of the radiation), but the radiation pressure allows one to trace back its fluctuations by observing the mirror motion. In this work, we implement a cavity optomechanical experiment based on an oscillating micromirror, and we measure correlations between the output light intensity fluctuations and the mirror motion. We demonstrate that the uncertainty of the former is reduced below the shot-noise level determined by the corpuscular nature of light. To reference this document use: http://resolver.tudelft.nl/uuid:0040143e-d0b4-46c6-a461-6d13f1e4ea3a DOI https://doi.org/10.1103/PhysRevA.97.033833 ISSN 2469-9926 Source Physical Review A: covering atomic, molecular, and optical physics and quantum information, 97 (3) Part of collection Institutional Repository Document type journal article Rights © 2018 A. Pontin, M. Bonaldi, A. Borrielli, L. Marconi, F. Marino, G. Pandraud, G.A. Prodi, Pasqualina M Sarro, E. Serra, F. Marin Files PDF 44903297_PhysRevA.97.033833.pdf 2.88 MB Close viewer /islandora/object/uuid:0040143e-d0b4-46c6-a461-6d13f1e4ea3a/datastream/OBJ/view