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Showing 2012 · quant-phShow all
3 papers · 2 filters
quant-ph2012★ 6 cited
Criteria and new classes of k-positive maps
Jinchuan Hou, Chi-Kwong Li, Yiu-Tung Poon +2
We study k-positive maps on operators. Proofs are given to different positivity criteria. Special attention is on positive maps arising in the study of quantum information science.…
quant-ph2012★ 9 cited
A geometric characterization of invertible quantum measurement maps
Kan He, Jin-Chuan Hou, Chi-Kwong Li
A geometric characterization is given for invertible quantum measurement maps. Denote by the convex set of all states (i.e., trace-1 positive operators) on Hilber…
quant-ph2012★ 1 cited
Linear preservers and quantum information science
Ajda Fosner, Zejun Huang, Chi-Kwong Li +1
Let be positive integers, the set of complex matrices and the set of complex matrices. Regard as the tensor space $M_m\otime…