Pontin, A;
Bonaldi, M;
Borrielli, A;
Marconi, L;
Marino, F;
Pandraud, G;
Prodi, GA;
... Marin, F; + view all
(2018)
Quantum nondemolition measurement of optical field fluctuations by optomechanical interaction.
Physical Review A
, 97
(3)
, Article 033833. 10.1103/PhysRevA.97.033833.
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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.
| Type: | Article |
|---|---|
| Title: | Quantum nondemolition measurement of optical field fluctuations by optomechanical interaction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevA.97.033833 |
| Publisher version: | https://doi.org/10.1103/PhysRevA.97.033833 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Optics, Physics, Atomic, Molecular & Chemical, Physics, RADIATION-PRESSURE, MECHANICAL OSCILLATOR, CAVITY OPTOMECHANICS, NOISE REDUCTION, SQUEEZED-LIGHT, SHOT-NOISE, MIRROR |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1529475 |
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