Unconditional quantum cloning of coherent states with linear optics

Details Unconditional quantum cloning of coherent states with linear optics Unconditional quantum cloning of coherent states with linear optics

2005-01-03

arxiv.org/abs/quant-ph/0501005v2

Physics

Quantum Physics

Phys. Rev. Lett. Volume 94, Number 24, p. 240503

Scientific paper

10.1103/PhysRevLett.94.240503

A scheme for optimal Gaussian cloning of optical coherent states is proposed and experimentally demonstrated. Its optical realization is based entirely on simple linear optical elements and homodyne detection. The optimality of the presented scheme is only limited by detection inefficiencies. Experimentally we achieved a cloning fidelity of about 65%, which almost touches the optimal value of 2/3.

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