Journal article · Preprint article
Probabilistic cloning of coherent states without a phase reference
We present a probabilistic cloning scheme operating independently of any phase reference. The scheme is based solely on a phase-randomized displacement and photon counting, omitting the need for nonclassical resources and nonlinear materials. In an experimental implementation, we employ the scheme to clone coherent states from a phase covariant alphabet and demonstrate that the cloner is capable of outperforming the hitherto best-performing deterministic scheme.
An analysis of the covariances between the output states shows that uncorrelated clones can be approached asymptotically. This simultaneously demonstrates how the effect of loss on coherent states can be compensated via noiseless preamplification.
Language: | English |
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Publisher: | AMER PHYSICAL SOC |
Year: | 2012 |
ISBN: | 0735402868 and 9780735402867 |
ISSN: | 10941622 , 10502947 and 24699926 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevA.86.010305 |
ORCIDs: | Andersen, Ulrik L. |
CONVENIENT FICTION NOISEOptics OPTICAL COHERENCE QUANTUM quant-ph