Abstract
A Gaussian cloning machine is presented that duplicates with a same fidelity two canonically conjugate continuous variables such as the quadratures of a mode of the electromagnetic field.This cloner is displacement and rotation covariant in phase space, hence it duplicates all coherent states with afidelity of 2/3. The optimality of this cloner is discussed, as well as the extension to N→M continuous cloners.
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© 2002 Kluwer Academic Publishers
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Cerf, N.J., Iblisdir, S. (2002). Universal Copying of Coherent States: A Gaussian Cloning Machine. In: Tombesi, P., Hirota, O. (eds) Quantum Communication, Computing, and Measurement 3. Springer, Boston, MA. https://doi.org/10.1007/0-306-47114-0_2
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DOI: https://doi.org/10.1007/0-306-47114-0_2
Publisher Name: Springer, Boston, MA
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