Generating Optical Schrödinger Kittens for Quantum Information Processing | Zendy

Alexei Ourjoumtsev | Zendy; Rosa Tualle-Brouri | Zendy; Julien Laurat | Zendy; Philippe Grangier | Zendy

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Generating Optical Schrödinger Kittens for Quantum Information Processing

Author(s) -

Alexei Ourjoumtsev,

Rosa Tualle-Brouri,

Julien Laurat,

Philippe Grangier

Publication year - 2006

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1122858

Subject(s) - kitten , superposition principle , quantum superposition , physics , coherent states , schrödinger's cat , amplitude , quantum , wigner distribution function , photon , quantum mechanics , pulse (music) , quantum optics , optics , cats , computer science , voltage , embedded system

We present a detailed experimental analysis of a free-propagating light pulse prepared in a “Schrödinger kitten” state, which is defined as a quantum superposition of “classical” coherent states with small amplitudes. This kitten state is generated by subtracting one photon from a squeezed vacuum beam, and it clearly presents a negative Wigner function. The predicted influence of the experimental parameters is in excellent agreement with the experimental results. The amplitude of the coherent states can be amplified to transform our “Schrödinger kittens” into bigger Schrödinger cats, providing an essential tool for quantum information processing.

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