Experimental generation of optical "Schrödinger cats" from photon number states
Identifieur interne : 009592 ( Main/Exploration ); précédent : 009591; suivant : 009593Experimental generation of optical "Schrödinger cats" from photon number states
Auteurs : Alexei Ourjoumtsev [France] ; Hyunseok Jeong [Australie] ; Rosa Tualle-Brouri [France] ; Philippe Grangier [France]Source :
- Proceedings of SPIE - The International Society for Optical Engineering [ 0277-786X ] ; 2007.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
A "Schrödinger cat" state of free-propagating light can be defined as a quantum superposition of well separated coherent states.1,2 We demonstrated, theoretically and experimentally, a protocol which allows to generate arbitrarily large squeezed Schrödinger cat states, using a homodyne detection and photon number states as resources. We implemented this protocol experimentally with light pulses containing two photons, producing a squeezed Schrödinger cat state with a negative Wigner function. This state clearly presents several quantum phase-space interference fringes between the "dead" and "alive" components, and it is large enough to become useful for experimental tests of quantum theory and quantum information processing.
Affiliations:
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Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Experimental study</term>
<term>Homodyne detection</term>
<term>Information processing</term>
<term>Interference fringe</term>
<term>Phase space</term>
<term>Photon number state</term>
<term>Quantum communication</term>
<term>Quantum information</term>
<term>Quantum optics</term>
<term>Quantum theory</term>
<term>Superposition principle</term>
<term>Wigner function</term>
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<term>Traitement information</term>
<term>Optique quantique</term>
<term>Information quantique</term>
<term>Principe superposition</term>
<term>Fonction Wigner</term>
<term>Théorie quantique</term>
<term>Etude expérimentale</term>
<term>Frange interférence</term>
<term>Etat nombre photon</term>
<term>Espace phase</term>
<term>Communication quantique</term>
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<front><div type="abstract" xml:lang="en">A "Schrödinger cat" state of free-propagating light can be defined as a quantum superposition of well separated coherent states.<sup>1,2</sup>
We demonstrated, theoretically and experimentally, a protocol which allows to generate arbitrarily large squeezed Schrödinger cat states, using a homodyne detection and photon number states as resources. We implemented this protocol experimentally with light pulses containing two photons, producing a squeezed Schrödinger cat state with a negative Wigner function. This state clearly presents several quantum phase-space interference fringes between the "dead" and "alive" components, and it is large enough to become useful for experimental tests of quantum theory and quantum information processing.</div>
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<name sortKey="Grangier, Philippe" sort="Grangier, Philippe" uniqKey="Grangier P" first="Philippe" last="Grangier">Philippe Grangier</name>
<name sortKey="Tualle Brouri, Rosa" sort="Tualle Brouri, Rosa" uniqKey="Tualle Brouri R" first="Rosa" last="Tualle-Brouri">Rosa Tualle-Brouri</name>
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<country name="Australie"><noRegion><name sortKey="Jeong, Hyunseok" sort="Jeong, Hyunseok" uniqKey="Jeong H" first="Hyunseok" last="Jeong">Hyunseok Jeong</name>
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