20 citations · 40 across the 10 of their papers we have counts for
10 papers
(Real)linear preservers of multiples of unitaries and matrix pairs with some extremal norm properties
Bojan Kuzma, Chi-Kwong Li, Edward Poon
We determine the structure of linear maps on complex (real) square matrices sending unitary (orthogonal) matrices to multiples of unitary (orthogonal) matrices. The result is used…
Measurement-induced entanglement entropy of gravitational wave detections
Preston Jones, Quentin G. Bailey, Andri Gretarsson +1
Research on the projective measurement of gravitons increasingly supports Dysons conclusions that the detection of single gravitons is not physically possible. It is therefore prud…
Noncommutative distances on graphs: An explicit approach via Birkhoff-James orthogonality
Pierre Clare, Chi-Kwong Li, Edward Poon +1
We study the problem of calculating noncommutative distances on graphs, using techniques from linear algebra, specifically, Birkhoff-James orthogonality. A complete characterizatio…
Linear preservers of parallel matrix pairs with respect to the -numerical radius
Bojan Kuzma, Chi-Kwong Li, Edward Poon +1
Let be integers. Two matrices and form a parallel pair with respect to the -numerical radius if for som…
Linear maps preserving parallel matrix pairs with respect to the Ky-Fan -norm
Bojan Kuzma, Chi-Kwong Li, Edward Poon +1
Two bounded linear operators and are parallel with respect to a norm if for some scalar with . Characterization is obtai…
Isospectrality and matrices with concentric circular higher rank numerical ranges
Edward Poon, Hugo J. Woerdeman
We characterize under what conditions Hermitian matrices and have the property that the spectrum of is independent of (thus, t…
Coherence measures induced by norm functions
Yangping Jing, Chi-Kwong Li, Edward Poon +1
Which matrix norms induce proper measures for quantifying quantum coherence? We study this problem for two important classes of norms and show that (i) coherence measures cannot be…
Nested Frobenius extensions of graded superrings
Edward Poon, Alistair Savage
This paper is the result of a research project completed in the context of the first author's Undergraduate Student Research Award from the Natural Sciences and Engineering Researc…
Entanglement transformation between sets of bipartite pure quantum states using local operations
H. F. Chau, Chi-Hang Fred Fung, Chi-Kwong Li +2
Alice and Bob are given an unknown initial state chosen from a set of pure quantum states. Their task is to transform the initial state to a corresponding final pure state using lo…
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…