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Open Quantum Systems Decoherence
Coherence generating power of unitary transformations via probabilistic average
arXiv
Authors: Lin Zhang, Zhihao Ma, Zhihua Chen, Shao-Ming Fei
Year
2017
Paper ID
25253
Status
Preprint
Abstract Read
~2 min
Abstract Words
88
Citations
N/A
Abstract
We study the ability of a quantum channel to generate quantum coherence when it applies to incoherent states. Based on probabilistic averages, we define a measure of such coherence generating power (CGP) for a generic quantum channel, based on the average coherence generated by the quantum channel acting on a uniform ensemble of incoherent states. Explicit analytical formula of the CGP for any unitary channels are presented in terms of subentropy. An upper bound for CGP of unital quantum channels has been also derived. Detailed examples are investigated.
Why This Paper Matters
- This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
- It adds a 2017 reference point for readers tracking recent quantum research.
- We study the ability of a quantum channel to generate quantum coherence when it applies to incoherent states.
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