We establish the necessary and sufficient conditions for local unbiased estimation in multi-parameter estimation tasks. More specifically, we first consider quantum state estimation, where multiple ...

A new tomographic study of the three-qubit CCZ gate on IBM superconducting processors reveals that output fidelity depends ...

NATO's new quantum roadmap and maritime trials make a scientific question urgent: does a laboratory improvement remain ...

A new study models how afterpulses in single-photon avalanche detectors degrade phase-matching quantum key distribution and shows that advantage distillation can recover much of the lost key rate and ...