English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

There exist memoryless zero-capacity quantum channels that when used jointlyresult in the channel with positive capacity. This phenomenon is calledsuperactivation. Making use of Parrondo's paradox, we exhibit examples ofsuperactivation-like effect for the capacity of classical communicationchannels as well as quantum and private capacity of quantum channels withmemory. There are several ingredients necessary for superactivation of quantumcapacity to occur in memoryless case. The first one is the requirement for thequantum channels which are amenable for superactivation to come from twodistinct families - binding entanglement channels and erasure channels. Thesecond one is the ability to utilize inputs which are entangled across the usesof the channels. Our construction uses a single family of erasure channels withclassical memory to achieve the same superactivation-like effect for quantumcapacity without any of the ingredients above.

Parrondo's paradox and superactivation of classical and quantum capacity of communication channels with memory