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The roles of quantum correlations in quantum cloning

In this paper, we study the entanglement and quantum discord of the output modes in the unified $1\rightarrow 2$ state-dependent cloning and probabilistic quantum cloning. The tripartite entanglement among the output modes and the quantum cloning machine is also considered. We find that the roles of the quantum correlations including the bipartite and tripartite entanglement and quantum discord strongly depend on the quantum cloning machines as well as the cloned state. In particular, it is found that this quantum cloning scheme can be realizable even without any quantum correlation.

preprint2014arXivOpen access
Jun ZhangShao-xiong WuChang-shui Yu
quant-ph
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Open access3 authors1 topic
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Jun ZhangShao-xiong WuChang-shui Yu

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