Yuji Hirota, Dariusz Chruściński, Takashi Matsuoka, Masanori Ohya
We study the correlations of classical and quantum systems from the information theoretical points of view. We analyze a simple measure of correlations based on entropy (such measure was already investigated as the degree of entanglement by Belavkin, Matsuoka and Ohya). Contrary to naive expectation, it is shown that separable state might possesses stronger correlation than an entangled state.
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http://arxiv.org/abs/1109.3438
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