20 papers
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…
Towards Robust Optimal Measurements Against Noise in Quantum Metrology
Xinglei Yu, Xinzhi Zhao, Liangsheng Li +4
Quantum parameter estimation utilizes quantum mechanical effects to attain higher measurement precision than classical schemes. In practical implementations, however, noise is inev…
Experimental violation of a Bell-like inequality for causal order
Yu Guo, Hao Tang, Bo-Xuan Wang +9
Quantum mechanics is compatible with scenarios where physical processes happen in an indefinite order. In theory, this feature could be detected through violations of inequalities…
Experimental genuine quantum nonlocality in the triangle network
Ning-Ning Wang, Chao Zhang, Huan Cao +8
In the last decade, it was understood that quantum networks involving several independent sources of entanglement which are distributed and measured by several parties allowed for…
Experimental detection of entanglement in multimode Gaussian states from high-order intensity correlation moments
Ze-Shan He, Yukuan Zhao, Hao-Shu Tian +4
Quantum universal invariants of a Gaussian state's covariance matrix, which can be derived from intensity correlation moments, have been adopted to characterize the entanglement pr…
A Metropolitan-scale Multiplexed Quantum Repeater with Bell Nonlocality
Tian-Xiang Zhu, Chao Zhang, Zhong-Wen Ou +7
Quantum repeaters can overcome exponential photon loss in optical fibers, enabling heralded entanglement between distant quantum memories. The definitive benchmark for this entangl…