AustralieFrV1, PascalFrancis, Checkpoint, bibRecord, 003910

Experimental generation of optical "Schrödinger cats" from photon number states

Identifieur interne : 003910 ( PascalFrancis/Checkpoint ); précédent : 003909; suivant : 003911

Experimental 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.

RBID : Pascal:08-0418760

Descripteurs français

Pascal (Inist)
- Détection homodyne, Traitement information, Optique quantique, Information quantique, Principe superposition, Fonction Wigner, Théorie quantique, Etude expérimentale, Frange interférence, Etat nombre photon, Espace phase, Communication quantique, 0130C, 4250D, 0367, 0367H.

English descriptors

KwdEn :
- Experimental study, Homodyne detection, Information processing, Interference fringe, Phase space, Photon number state, Quantum communication, Quantum information, Quantum optics, Quantum theory, Superposition principle, Wigner function.

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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<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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Experimental generation of optical "Schrödinger cats" from photon number states

Experimental generation of optical "Schrödinger cats" from photon number states

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