300 citations · 1.9k across the 76 of their papers we have counts for
5 papers · 2 filters
Hardy's Paradox and Measurement-disturbance Relations
Kazuo Fujikawa, C. H. Oh, Sixia Yu
We establish a quantitative relation between Hardy's paradox and the breaking of uncertainty principle in the sense of measurement-disturbance relations in the conditional measurem…
Quantum pigeonhole effect, Cheshire cat and contextuality
Sixia Yu, C. H. Oh
A kind of paradoxical effects has been demonstrated that the pigeonhole principle, i.e., if three pigeons are put in two pigeonholes then at least two pigeons must stay in the same…
Robust quantum metrological schemes based on protection of quantum Fisher information
Xiao-Ming Lu, Sixia Yu, C. H. Oh
Fragile quantum features such as entanglement are employed to improve the precision of parameter estimation and as a consequence the quantum gain becomes vulnerable to noise. As an…
Bell's inequality and extremal nonlocal box from Hardy's test for nonlocality
Sixia Yu
Bell showed 50 years ago that quantum theory is nonlocal via his celebrated inequalities, turning the issue of quantum nonlocality from a matter of taste into a matter of test. Yea…
Optimal joint measurement of two observables of a qubit
Sixia Yu, C. H. Oh
Heisenberg's uncertainty relations for measurement quantify how well we can jointly measure two complementary observables and have attracted much experimental and theoretical atten…