10 citations · 13 across the 8 of their papers we have counts for
10 papers
Fixed-Point Bifurcations and Path-Information Bounds in Nonlinear Exceptional-Point Sensing
Xue-Hao Yu, Cong-Feng Qiao
Nonlinear exceptional points (NEPs) were proposed to circumvent the noise--responsivity cancellation that limits linear exceptional-point sensors. At an NEP, the stationary frequen…
Radial Coarse Graining Restores Vacuum Majorization in Wigner Phase Space
Ao-Xiang Liu, Cong-Feng Qiao
Quantum uncertainty limits how strongly Wigner functions can concentrate in phase space. It is commonly conjectured that the vacuum Wigner function continuously majorizes that of a…
Geometric Optimization over Quantum State Spaces: Tight Uncertainty Relations and Resource Certification
Ma-Cheng Yang, Cong-Feng Qiao
Determining the fundamental limits of nonlinear functionals of quantum measurement statistics is a crucial yet generally intractable nonconvex optimization problem. We introduce a…
Ascertaining higher-order quantum correlations in high energy physics
Ao-Xiang Liu, Cong-Feng Qiao
Nonlocality is a peculiar nature of quanta and it stands as an important quantum resource in application. Yet mere linear property of it, viz. the first order in moment, has been e…
Witness High-Dimensional Quantum Steering via Majorization Lattice
Ma-Cheng Yang, Cong-Feng Qiao
Quantum steering enables one party to influence another remote quantum state by local measurement. While steering is fundamental to many quantum information tasks, the existing det…
Conditions for Quantum Violation of Macrorealism in Large-spin Limit
Qi-Hong Cai, Xue-Hao Yu, Ma-Cheng Yang +2
This study investigates the emergence of macroscopic classical behavior from quantum foundations via the entropic Leggett--Garg inequality. We introduce a geometric framework for d…
Probabilistic Coherence Transformation Under Strictly Incoherent Operation
Ao-Xiang Liu, Cong-Feng Qiao
The coherence transformation is pivotal for quantum technologies, which cannot always be accomplished deterministically. We investigate the probabilistic coherence transformation u…
Entanglement Criteria Based on Quantum Fisher Information
Ao-Xiang Liu, Ma-Cheng Yang, Cong-Feng Qiao
To optimize the entanglement detection, we formulate the metrologically operational entanglement condition in quantum Fisher information by maximizing the QFI on the measurement or…
An Effective Way to Determine the Separability of Quantum State
Ma-Cheng Yang, Cong-Feng Qiao
We propose in this work a practical approach to address the longstanding and challenging problem of quantum separability, leveraging the correlation matrices of generic observables…
Quantum Uncertainty Equalities and Inequalities for Unitary Operators
Ao-Xiang Liu, Ma-Cheng Yang, Cong-Feng Qiao
We explore the uncertainty relation for unitary operators in a new way and find two uncertainty equalities for unitary operators, which are minimized by any pure states. Additional…