Optimal non-demolition quantum measurements

Informations projet

ONDEQUAM

N° de convention de subvention: 626628

Projet clôturé

Date de début 1 Avril 2014

Date de fin 31 Mars 2016

Financé au titre de

• Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)

Coût total € 194 046,60

Contribution de l’UE € 194 046,60

Coordonné par

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France

Objectif

The goal of the project is the development and implementation of novel, highly efficient techniques for the quantum non-demolition measurement of photon number states. Cavity-QED experiments using Rydberg atoms to probe microwave fields stored in ultra-high finesse resonators have witnessed enormous progress in the past decades. Optimization of the information extraction rate will enable us to study new types of states which so far have been experimentally inaccessible due to their fast decoherence rates. The scope of the emerging experimental prospects ranges from the stabilization of mesoscopic photon states to the preparation of non-local NOON - states. A thorough understanding of the decoherence dynamics of complex, mesoscopic states is of fundamental interest in quantum physics, while controlling the environment-induced decay is an important prerequisite for virtually all possible future technological implementations of quantum devices.
The project goals will be achieved by employing two different advanced QND methods, which will consume significantly fewer resources in terms of probe atoms and measurement time. The first method is based on the real-time evaluation of all information available from preceding QND detections in order to optimize the phase setting of the Ramsey interferometer that is used to perform the QND measurement. In a second step we will further enhance the efficiency of the measurement by simultaneously utilizing different velocity classes to also tune the atom-photon interaction itself. This promises to eventually permit data extraction rates close to the optimum given by information theory. Both methods will initially be evaluated with a single cavity, and then adapted to a dual-cavity setup, which will allow us to operate also with non-local states.

Champ scientifique (EuroSciVoc)

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• sciences naturelles › sciences physiques › physique quantique
• sciences naturelles › sciences physiques › physique théorique › physique des particules › photons

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Programme(s)

• FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)

Thème(s)

• FP7-PEOPLE-2013-IEF - Marie-Curie Action: "Intra-European fellowships for career development"

Appel à propositions

FP7-PEOPLE-2013-IEF
Voir d’autres projets de cet appel

Régime de financement

MC-IEF -

Coordinateur

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS

• Contribution de l’UE: € 194 046,60
• Adresse: RUE MICHEL ANGE 3 ; 75794 Paris ; France
• Région: Ile-de-France › Ile-de-France › Hauts-de-Seine
• Type d’activité: Organismes de recherche
• Coût total: Aucune donnée