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A coherence-generating quantum channel with incoherent input and output. In such circumstances, the quantum coherence generated in a directly inaccessible system seems undetectable.
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Theoretical and experimental studies have suggested the relevance of quantum coherence to the performance of photovoltaic and light-harvesting complex molecular systems. However, there are ambiguities regarding the validity of statements we can make about the coherence in such systems. Here we analyze the general procedure for coherence detection i...
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