22 citations · 22 across the 2 of their papers we have counts for
6 papers
Fully-Passive Twin-Field Quantum Key Distribution
Wenyuan Wang, Rong Wang, H. F. Chau +1
We propose a fully passive twin-field quantum key distribution (QKD) setup where basis choice, decoy-state preparation and encoding are all implemented entirely by post-processing…
Physical time-energy cost of a quantum process determines its information fidelity
Chi-Hang Fred Fung, H. F. Chau
A quantum system can be described and characterized by at least two different concepts, namely, its physical and informational properties. Here, we explicitly connect these two con…
Time-Energy Measure for Quantum Processes
Chi-Hang Fred Fung, H. F. Chau
Quantum mechanics sets limits on how fast quantum processes can run given some system energy through time-energy uncertainty relations, and they imply that time and energy are trad…
Disguising quantum channels by mixing and channel distance trade-off
Chi-Hang Fred Fung, H. F. Chau
We consider the reverse problem to the distinguishability of two quantum channels, which we call the disguising problem. Given two quantum channels, the goal here is to make the tw…
Relation Between Quantum Speed Limits And Metrics On U(n)
Kai-Yan Lee, H. F. Chau
Recently, Chau [Quant. Inform. & Comp. 11, 721 (2011)] found a family of metrics and pseudo-metrics on -dimensional unitary operators that can be interpreted as the minimum reso…
Structural Characterization And Condition For Measurement Statistics Preservation Of A Unital Quantum Operation
Kai-Yan Lee, Chi-Hang Fred Fung, H. F. Chau
We investigate the necessary and sufficient condition for a convex cone of positive semidefinite operators to be fixed by a unital quantum operation acting on finite-dimensiona…