Generating optical Schrödinger kittens for quantum information processing

Science
Alexei OurjoumtsevPhilippe Grangier

Abstract

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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Citations

Aug 19, 2007·Nature·Alexei OurjoumtsevPhilippe Grangier
Nov 18, 2010·Nature Communications·Roman SchnabelPing K Lam
Dec 10, 2009·Proceedings of the National Academy of Sciences of the United States of America·R M GomesS P Walborn
Mar 1, 2008·Science·Ian A Walmsley
Apr 16, 2011·Science·Noriyuki LeeAkira Furusawa
Apr 16, 2011·Science·Philippe Grangier
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