Optimal Gaussian $N$-to-$M$ cloning with linear optics and Gaussian cloning of known-phase coherent states

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dc.creatorNamiki, Ryo
dc.creatorKoashi, Masato
dc.creatorImoto, Nobuyuki
dc.date2006-09-22
dc.date.accessioned2026-07-07T07:30:15Z
dc.date.available2026-07-07T07:30:15Z
dc.descriptionWe show how to implement the optimal Gaussian $N$-to-$M$ cloning with linear optics and homodyne detection. We also show that the Gaussian $N$-to-$M$ cloning of known-phase coherent states can be performed with the fidelity $\sqrt \frac{2 M N}{2M N+M -N}$ by linear optics and homodyne detection, and with $\frac{2}{\sqrt{1+\frac{1}{N}}+\sqrt {1-\frac{1}{M}}}$ by utilizing quadrature squeezing. From the classical limit of the cloning (1-to-$\infty$ cloning), a necessary condition of continuous variable quantum key distribution using known-phase coherent states is provided.
dc.identifierhttps://arxiv.org/abs/quant-ph/0609170
dc.identifierhttp://arxiv.org/abs/quant-ph/0609170
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118398
dc.subjectQuantum Physics
dc.titleOptimal Gaussian $N$-to-$M$ cloning with linear optics and Gaussian cloning of known-phase coherent states
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