Operational bounds on state exclusion (not only identification) plus a three-setting retained-key protocol certify positive SDI-QKD rates down to nearly vanishing preparation visibility.
The algebra is generated byB 0,B 1,B 2,z 0,d 0,z 1,d 1, with B2 y =B y,[B y,zk] = [By,dk] = 0, d k =z† k
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Semi-Device-Independent Quantum Key Distribution from Operational Assumptions
Operational bounds on state exclusion (not only identification) plus a three-setting retained-key protocol certify positive SDI-QKD rates down to nearly vanishing preparation visibility.