A resource theory for the coherence of Gaussian quantum channels is proposed, with structural characterizations of incoherent channels and superchannels and a computable relative-entropy measure.
Coherence of quantum channels
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abstract
We investigate the coherence of quantum channels and establish a resource theory for quantifying the coherence of quantum channels via Choi matrix. To this aim, we define the incoherent channels and incoherent superchannels. This theory recovers the case of quantum states when we view quantum states as a special case of quantum channels and also, this theory allows some analytical expressions for coherence measures.
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quant-ph 1years
2019 1verdicts
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Coherence of quantum Gaussian channels
A resource theory for the coherence of Gaussian quantum channels is proposed, with structural characterizations of incoherent channels and superchannels and a computable relative-entropy measure.