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quant-ph2026
Correlation Geometry of Quantum Sensor Networks: Local-Global Information Flow and Local Privacy
Gong-Chu Li, Lei Chen, Xu-Song Hong +7
Quantum sensor networks (QSN) typically encode N unknown parameters while targeting a single linear combination, rendering the N-1 remaining parameters as nuisance directions. To r…
quant-ph2026
Informationally Complete Distributed Metrology Without a Shared Reference Frame
Hua-Qing Xu, Gong-Chu Li, Xu-Song Hong +6
In quantum information processing, implementing arbitrary preparations and measurements on qubits necessitates precise information to identify a specific reference frame (RF). In s…
quant-ph2025
Nonlinear Enhancement of Measurement Precision via a Hybrid Quantum Switch
Lei Chen, Yu-Xiang Yang, Gong-Chu Li +8
Quantum metrology promises measurement precision beyond the classical limit by using suitably tailored quantum states and detection strategies. However, scaling up this advantage i…