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Completely positive maps and entropy inequalities |
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| Authors: | Göran Lindblad |
| Affiliation: | 1. Department of Theoretical Physics, Royal Institute of Technology, Stockholm, Sweden |
| Abstract: | It is proved that the relative entropy for a quantum system is non-increasing under a trace-preserving completely positive map. The proof is based on the strong sub-additivity property of the quantum-mechanical entropy. |
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