G. Torlai, G. McKeown, P. Marek, R. Filip, H. Jeong, M. Paternostro, G. De Chiara
We show that the use of probabilistic noiseless amplification in entangled coherent state-based schemes for the test of quantum non locality provides significant advantages. The threshold amplitude to falsify a Bell-CHSH non locality test, in fact, is significantly reduced when amplification is embedded into the test itself, while any detection-inefficiency effect can be effectively compensated by tuning the amplification gain. We extend our analysis to general tests of quantum non locality in phase space, therefore affirming noiseless amplification as a valuable tool for coherent information processing and the generation of strongly non-classical states of bosonic systems.
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http://arxiv.org/abs/1301.3183
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