Elementary constructive approach to the higher-rank numerical ranges of unitary matrices
Quantum Physics
2007-07-03 v1
Abstract
Some problems of the quantum error-correcting codes theory can be reduced to the investigation of the higher-rank numerical ranges of the operators related to the error operators. We constructively verify a conjecture on the structure of higher-rank numerical range for unitary matrices.
Cite
@article{arxiv.0707.0170,
title = {Elementary constructive approach to the higher-rank numerical ranges of unitary matrices},
author = {A. Ya. Kazakov},
journal= {arXiv preprint arXiv:0707.0170},
year = {2007}
}
Comments
4 figures