Separating Classical and Quantum Correlations |
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| Authors: | E G Beltrametti S Bugajski |
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| Institution: | 1. Department of Physics, University of Genoa, Italy. Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Italy
2. Institute of Physics, University of Silesia, Poland. Institute of Pure and Applied Informatics, Polish Academy of Sciences, Poland
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| Abstract: | We examine to what extent the correlation between two quantum observables at a mixed state can be separated into a classical and a quantum term. The nonunique decomposition of quantum mixed states into pure states makes such a separation ambiguous. We outline this fact by a simple example, which also shows that classical and quantum correlations may cancel each other out. |
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