Optimal cloning of coherent states with a linear amplifier and beam splitters

Details Optimal cloning of coherent states with a linear amplifier and beam splitters Optimal cloning of coherent states with a linear amplifier and beam splitters

2000-12-11

arxiv.org/abs/quant-ph/0012046v1

Phys. Rev. Lett. 86, 4938 (2001)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.86.4938

A transformation achieving the optimal symmetric N-to-M cloning of coherent states is presented. Its implementation only requires a phase-insensitive linear amplifier and a network of beam splitters. An experimental demonstration of this continuous-variable cloner should therefore be in the scope of current technology. The link between optimal quantum cloning and optimal amplification of quantum states is also pointed out.

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