300 citations · 1.9k across the 76 of their papers we have counts for
9 papers · 2 filters
Quantum contextuality and joint measurement of three observables of a qubit
Sixia Yu, C. H. Oh
Whereas complementarity manifests itself via two incompatible observables, quantum contextuality can only be revealed via the joint measurements among at least three observables. B…
Improved Error-Tradeoff and Error-Disturbance Relations
Xiao-Ming Lu, Sixia Yu, Kazuo Fujikawa +1
Heisenberg's uncertainty principle is quantified by error-disturbance tradeoff relations, which have been tested experimentally in various scenarios. Here we shall report improved…
Detecting and estimating continuous-variable entanglement by local orthogonal observables
Chengjie Zhang, Sixia Yu, Qing Chen +1
Entanglement detection and estimation are fundamental in quantum information science. Compared with discrete-variable states, for which lots of efficient entanglement detection cri…
Tripartite entangled pure states are tripartite nonlocal
Sixia Yu, C. H. Oh
Nonlocal correlations as revealed by the violations to Bell inequalities are incompatible with local models without any nonlocal correlations. However some tripartite entangled sta…
Test of Genuine Multipartite Nonlocality Without Inequality
Qing Chen, Sixia Yu, Chengjie Zhang +2
In this letter we propose a set of conditions on the joint probabilities as a test of genuine multipartite nonlocality without inequality. Our test is failed by all non-signaling l…
Robertson-Schroedinger Uncertainty Relation Refined by Skew Information
Sixia Yu, C. H. Oh
We report a refinement of Robertson-Schroedinger uncertainty relation via Wigner-Yanase skew information. Besides the well known quantum uncertainty arising from the noncommutativi…