Edward Poon

collaborators

4 papers

math.FA2025

(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…

gr-qc2024

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…

math.OA2024

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…

math.FA2024

Linear preservers of parallel matrix pairs with respect to the $k$ -numerical radius

Bojan Kuzma, Chi-Kwong Li, Edward Poon +1

Let $1 \leq k < n$ be integers. Two $n \times n$ matrices $A$ and $B$ form a parallel pair with respect to the $k$ -numerical radius $w_{k}$ if $w_{k} (A + I^¼ B) = w_{k} (A) + w_{k} (B)$ for so…

(Real)linear preservers of multiples of unitaries and matrix pairs with some extremal norm properties

Measurement-induced entanglement entropy of gravitational wave detections

Noncommutative distances on graphs: An explicit approach via Birkhoff-James orthogonality

Linear preservers of parallel matrix pairs with respect to the k-numerical radius

Linear preservers of parallel matrix pairs with respect to the $k$ -numerical radius