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Experimental Investigation of the Evolution of Gaussian Quantum Discord in an Open System

Gaussian quantum discord is a measure of quantum correlations in Gaussian systems. Using Gaussian discord we quantify the quantum correlations of a bipartite entangled state and a separable two-mode mixture of coherent states. We experimentally analyze the effect of noise addition and dissipation on Gaussian discord and show that the former noise degrades the discord while the latter noise for some states leads to an increase of the discord. In particular, we experimentally demonstrate the near-death of discord by noisy evolution and its revival through dissipation.

preprint2012arXivOpen access
Lars S. MadsenAdriano BerniMikael LassenUlrik L. Andersen
quant-ph
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Open access4 authors1 topic
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Lars S. MadsenAdriano BerniMikael LassenUlrik L. Andersen

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