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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Unsharp measurements play an increasingly important role in quantuminformation theory. In this paper, we study a three-partyprepare-transform-measure experiment with unsharp measurements based on $ 3\rightarrow 1 $ sequential random access codes (RACs). We derive optimaltrade-off between the two correlation witnesses in $ 3 \rightarrow 1 $sequential quantum random access codes (QRACs), and use the result to completethe self-testing of quantum preparations, instruments and measurements forthree sequential parties. We also give the upper and lower bounds of thesharpness parameter to complete the robustness analysis of the self-testingscheme. In addition, we find that classical correlation witness violation basedon $3 \rightarrow 1 $ sequential RACs cannot be obtained by both correlationwitnesses simultaneously. This means that if the second party uses strongunsharp measurements to overcome the classical upper bound, the third partycannot do so even with sharp measurements. Finally, we give the analysis andcomparison of the random number generation efficiency under different sharpnessparameters based on the determinant value, $2 \rightarrow 1 $ and $3\rightarrow 1 $ QRACs separately. This letter sheds new light on generatingrandom numbers among multi-party in semi-device independent framework.

Certification of three black boxes with unsharp measurements using $3 \rightarrow 1 $ sequential quantum random access codes