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

The characterization of multi-time correlations in open quantum systems is offundamental importance. In this work, we investigate multi-time processes usingthe process matrix formalism and show that the presence of a quantumnon-Markovian environment plays a significant role in enhancing thecommunication capacity in sequential prepare-transform-measure Quantum RandomAccess Codes (QRAC). The correlated environment enables a quantum advantage tomultiple parties, even with projective measurements. In particular, we showthat the Markovian and classical non-Markovian processes, i.e. quantumprocesses with classical feedback from the environment, do not yield sequentialquantum advantage. In contrast, it is possible to achieve an advantage in thepresence of a quantum non-Markovian environment. Therefore this approach allowsa semi-device-independent certification of quantum non-Markovianity. As opposedto entanglement-detection criteria which require the knowledge of the completeprocess, this method allows to certify the presence of a quantum non-Markovianenvironment from the observed measurement statistics. Moreover, quantum memoryameliorates the unambiguous certifiable region of unsharp instruments in asemi-device-independent manner.

Semi-device-independent certification of quantum non-Markovianity using sequential Random Access Codes