Extracting quantum coherence via steering

As the precious resource for quantum information processing, quantum coherence can be created remotely if the involved two sites are quantum correlated. It can be expected that the amount of coherence created should depend on the quantity of the shared quantum correlation, which is also a resource....

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Bibliographic Details
Published in:Scientific reports 2016-09, Vol.6 (1), p.34380-34380, Article 34380
Main Authors: Hu, Xueyuan, Fan, Heng
Format: Article
Language:English
Subjects:
639/766/483/1139
639/766/483/481
Entropy
Humanities and Social Sciences
Information processing
multidisciplinary
Quantum theory
Science
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Summary:As the precious resource for quantum information processing, quantum coherence can be created remotely if the involved two sites are quantum correlated. It can be expected that the amount of coherence created should depend on the quantity of the shared quantum correlation, which is also a resource. Here, we establish an operational connection between coherence induced by steering and the quantum correlation. We find that the steering-induced coherence quantified by such as relative entropy of coherence and trace-norm of coherence is bounded from above by a known quantum correlation measure defined as the one-side measurement-induced disturbance. The condition that the upper bound saturated by the induced coherence varies for different measures of coherence. The tripartite scenario is also studied and similar conclusion can be obtained. Our results provide the operational connections between local and non-local resources in quantum information processing.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep34380