Local and nonlocal cloning of coherent states with known phases using linear optics
Yuli Dong, Xu‐Bo Zou, Guang‐Can Guo · Physical Review A · 2008
First, we present a scheme for implementation of$N\ensuremath{\rightarrow}M$ local cloning of coherent states with known phases, based on linear optics, single-mode squeezed sources, and homodyne detection. The amplification of such cloning is accomplished with the help of a strongly single-mode squeezed source. Then we propose a scheme for $N\ensuremath{\rightarrow}M$ nonlocal cloning of such input states by employing an additional two-mode squeezed source. In the case of ideal squeezed sources, the fidelities of the two cloning machines can reach a high level.