A multipartite device-independent QKD protocol generates shared keys directly from measurement settings certified by maximal violation of the Hardy paradox, achieving positive key rates and higher pairwise rates.
So that A1 does not have to drop some of the runs where +1 outcome of the measurement A1 1 gets clicked
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Multipartite Hardy paradox unlocks device-independent key sharing
A multipartite device-independent QKD protocol generates shared keys directly from measurement settings certified by maximal violation of the Hardy paradox, achieving positive key rates and higher pairwise rates.