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Conference Paper

Experimental quantum cloning with continuous variables

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Andersen,  Ulrik L.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Luetkenhaus,  Norbert
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Andersen, U. L., Josse, V., Luetkenhaus, N., & Leuchs, G. (2007). Experimental quantum cloning with continuous variables. In QUANTUM INFORMATION WITH CONTINOUS VARIABLES OF ATOMS AND LIGHT (pp. 305-322). 57 SHELTON STREET, COVENT GARDEN WC2H 9HE, ENGLAND: IMPERIAL COLL PRESS.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D66-C
Abstract
In this chapter we present a scheme for optimal Gaussian cloning of optical coherent states. Its optical realization is based entirely on simple linear optical elements and homodyne detection. This is in contrast to previous proposals where parametric processes were suggested to be used for optimal Gaussian cloning. The optimality of the presented scheme is only limited by detection inefficiencies. Experimentally we achieved a cloning fidelity of up to 65%, which almost touches the optimal value of 2/3.