Linear amplification and quantum cloning for non-Gaussian continuous variables
arXiv:1009.2306 · doi:10.1088/1367-2630/12/10/103010
Abstract
We investigate phase-insensitive linear amplification at the quantum limit for single- and two-mode states and show that there exists a broad class of non-Gaussian states whose nonclassicality survives even at an arbitrarily large gain. We identify the corresponding observable nonclassical effects and find that they include, remarkably, two-mode entanglement. The implications of our results for quantum cloning outside the Gaussian regime are also addressed.
published version with reference update
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