Nature Communications (Oct 2021)

Entropic singularities give rise to quantum transmission

  • Vikesh Siddhu

DOI
https://doi.org/10.1038/s41467-021-25954-0
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 8

Abstract

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Non-additivity of the quantum channel coherent information is known to occur in some very noisy channels, but its fundamental origin is unclear. Here, the author explains its link with log singularity of quantum entropy, and shows that it can also come up for low-noise channels.