11 papers
Private Correlations Certify Sensing Capability
Yunkai Wang, Peixue Wu, Graeme Smith +1
We show that private correlations in a bipartite quantum state constitute a metrological resource for distributed sensing assisted by a possibly noisy channel from one party to the…
Subsystem Quantum Error Correction for Noisy Quantum Metrology
Qiushi Liu, Sisi Zhou
Quantum error correction has been successfully applied to enhance the precision of parameter estimation in the presence of noise. Nonetheless, existing methods require a number of…
Optimal classical shadow estimation of unitary channels at Heisenberg limit
Entong He, Zihao Li, Noam Scully +2
Full tomography of an unknown quantum evolution is resource-intensive and often unnecessary when the goal is only to predict selected properties. This motivates the study of classi…
Quantum metrology via partial quantum error correction
Yinan Chen, Zongyuan Wang, Sisi Zhou
We introduce a method for error-corrected quantum metrology where only partial quantum error correction (QEC) is needed to suppress local noise and maintain the probe states' super…
Distributed estimation of many-body Hamiltonians via punctured surface code
Linmu Qiao, Zhichun Ouyang, Sisi Zhou
We study how a punctured surface code can turn many local -type couplings into one protected logical signal for distributed quantum metrology, where the goal is to estimate a we…
Quantum metrology of mixed states via purification
Sisi Zhou
Multiparameter quantum metrology is ubiquitous in physics, yet it remains fundamentally challenging. As reflected by the uncertainty principle, distinct unknown parameters generall…