Squeezed Light Enhancement of Optomechanical Systems

Informations projet

SQZOMS

N° de convention de subvention: 660941

DOI

10.3030/660941

Projet clôturé

Date de signature de la CE 18 Mars 2015

Date de début 15 Septembre 2015

Date de fin 14 Septembre 2017

Financé au titre de

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coût total

€ 173 076,00

Contribution de l’UE

€ 173 076,00

Coordonné par

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France

Periodic Reporting for period 1 - SQZOMS (Squeezed Light Enhancement of Optomechanical Systems)

Période du rapport: 2015-09-15 au 2017-09-14

Résumé du contexte et des objectifs généraux du projet

Advancements over the last quarter-century have led to moving-mirror interferometric experiments obtaining the most sensitive displacement measurements to date, with sensitivities of better than a few-millionths of the diameter of a nucleus. In such experiments, even if technical noise has been reduced, quantum noise sources are still present. The objectives of this project were to push the sensitivity of such devices to the quantum-noise limit, and then further beyond through the use of specialized light sources called squeezed light sources. This is of keen interest to the rapidly expanding fields of precision measurement and quantum information processing.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

The project has first resulted in a cryogenically-cooled macroscopic moving-mirror device approaching the quantum-noise limit (shown in the left figure), of which publications are in journal review. As part of this work, a new control system architecture was developed for the experiment, that allows flexibility and robustness for control system implementation, with changeable control functions in an in-house developed graphical-user-interface. The Advanced Beta version of this architecture was made publicly downloadable and available for scientific research use. The second result of the project saw the full design and construction of a squeezed light source (shown in the right figure) that is fully compatible with coupling to the macroscopic moving-mirror device experiment. This included characterization and verification of component subsystems, as well as implementation of the same control system architecture. The progress and results of the project have been presented at meetings (such as JMC15 “Optomechanics Colloquium” 2016) and outreach events (such ENS Open Night 2017 Precision Measurement)

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

The project result of the cryogenically-cooled macroscopic moving-mirror device has pushed the approach towards the quantum-noise limit in such systems as has never been achieved before. The specialized squeezed source has the capability to push even further. Possible potential application pathways range from novel high-bandwidth, thermal-noise-free mechanical sensing devices to tests of quantum theory and quantum measurement theory itself.

Moving mirror device (left) and specialized squeezed light source (right)