300 citations · 1.9k across the 76 of their papers we have counts for
8 papers · 2 filters
Quantum channels that preserve the commutativity
Sixia Yu, Chengjie Zhang, Qing Chen +1
We identify and characterize all the local quantum channels that preserves the set of classical states, i.e., does not create any quantum correlations. At first we show that the qu…
Minimal Kochen-Specker theorem in finite dimensions
Sixia Yu, C. H. Oh
In [1] we proved a strengthened Kochen-Specker theorem in 3 dimensions: non-contextual hidden variable (NCHV) models cannot reproduce all the quantum correlations of two compatible…
Bell Function Values Approach to Topological Quantum Phase Transitions
Dong-Ling Deng, Chunfeng Wu, Jing-Ling Chen +3
We investigate the relation between Bell function values (BFV) of the reduced density matrix and the topological quantum phase transitions in the Kitaev-Castelnovo-Chamon model. %…
State-independent proof of Kochen-Specker theorem with 13 rays
Sixia Yu, C. H. Oh
Quantum contextuality, as proved by Kochen and Specker, and also by Bell, should manifest itself in any state in any system with more than two distinguishable states and recently h…
Tight bounds for the quantum discord
Sixia Yu, Chengjie Zhang, Qing Chen +1
Quantum discord quantifies quantum correlations beyond entanglement and assumes nonzero values, which are notoriously hard to compute, for almost all quantum states. Here we provid…
Witnessing the quantum discord of all the unknown states
Sixia Yu, Chengjie Zhang, Qing Chen +1
Like entanglement, quantum discord quantifies the quantum correlations. Unlike entanglement, whose detection is extremely difficult, the quantum discord of an arbitrary bipartite s…