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20072026
most citedCanonical forms, higher rank numerical range, convexity, totally isotropic subspace, matrix equations

84 citations · 379 across the 37 of their papers we have counts for

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math-ph2012★ 20 cited

Physical transformations between quantum states

Zejun Huang, Chi-Kwong Li, Edward Poon +1

Given two sets of quantum states {A_1, ..., A_k} and {B_1, ..., B_k}, represented as sets of density matrices, necessary and sufficient conditions are obtained for the existence of…

math-ph2011★ 2 cited

Induced Metric And Matrix Inequalities On Unitary Matrices

H. F. Chau, C. -K. Li, Y. -T. Poon +1

Recently, Chau [Quant. Inform. & Comp. 11, 721 (2011)] showed that one can define certain metrics and pseudo-metrics on U(n), the group of all unitary matrices, based o…