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Quantum optics

Discord in the ranks

The use of a new measure of what it means for a system to be quantum has profound technological and philosophical ramifications for the field of quantum information processing.

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Figure 1: Geometry of the set of quantum states, showing the boundary between states with and without quantum correlations.

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Correspondence to Animesh Datta.

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Datta, A. Discord in the ranks. Nature Photon 6, 724–725 (2012). https://doi.org/10.1038/nphoton.2012.269

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