ONDEQUAM

Optimal non-demolition quantum measurements

 Coordinatore CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE 

 Organization address address: Rue Michel -Ange 3
city: PARIS
postcode: 75794

contact info
Titolo: Ms.
Nome: Julie
Cognome: Zittel
Email: send email
Telefono: 3342349416
Fax: 33142349508

 Nazionalità Coordinatore France [FR]
 Totale costo 194˙046 €
 EC contributo 194˙046 €
 Programma FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
 Code Call FP7-PEOPLE-2013-IEF
 Funding Scheme MC-IEF
 Anno di inizio 2014
 Periodo (anno-mese-giorno) 2014-04-01   -   2016-03-31

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

 Organization address address: Rue Michel -Ange 3
city: PARIS
postcode: 75794

contact info
Titolo: Ms.
Nome: Julie
Cognome: Zittel
Email: send email
Telefono: 3342349416
Fax: 33142349508

FR (PARIS) coordinator 194˙046.60

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 Word cloud

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quantum    cavity    qnd    probe    time    local    photon    extraction    atoms    mesoscopic    us    rates    decoherence   

 Obiettivo del progetto (Objective)

'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.'

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