18 citations · 40 across the 13 of their papers we have counts for
13 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 quantum metrology scheme in which partial quantum error correction suppresses local noise while preserving sensitivity beyond the standard quantum limit. The probes…
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…
Achieving the Heisenberg limit using fault-tolerant quantum error correction
Himanshu Sahu, Qian Xu, Sisi Zhou
Quantum effect enables enhanced estimation precision in metrology, with the Heisenberg limit (HL) representing the ultimate limit allowed by quantum mechanics. Although the HL is g…
Quantum Error Corrected Non-Markovian Metrology
Zachary Mann, Ningping Cao, Raymond Laflamme +1
Quantum metrology aims to maximize measurement precision on quantum systems, with a wide range of applications in quantum sensing. Achieving the Heisenberg limit (HL) - the fundame…
Limitations of Gaussian measurements in quantum imaging
Yunkai Wang, Sisi Zhou
Imaging thermal sources naturally yields Gaussian states at the receiver, raising the question of whether Gaussian measurements can perform optimally in quantum imaging. In this wo…
Randomized measurements for multi-parameter quantum metrology
Sisi Zhou, Senrui Chen
The optimal quantum measurements for estimating different unknown parameters in a parameterized quantum state are usually incompatible with each other. Traditional approaches to ad…
Limits of noisy quantum metrology with restricted quantum controls
Sisi Zhou
The Heisenberg limit (HL, with estimation error scales as ) and the standard quantum limit (SQL, ) are two fundamental limits in estimating an unknown para…
Approximate symmetries and quantum error correction
Zi-Wen Liu, Sisi Zhou
Quantum error correction (QEC) is a key concept in quantum computation as well as many areas of physics. There are fundamental tensions between continuous symmetries and QEC. One v…
State-Independent Error-Disturbance Tradeoff For Measurement Operators
S. S. Zhou, Shengjun Wu, H. F. Chau
In general, classical measurement statistics of a quantum measurement is disturbed by performing an additional incompatible quantum measurement beforehand. Using this observation,…