Compare Papers
Paper 1
Elementary constructive approach to the higher-rank numerical ranges of unitary matrices
A. Ya. Kazakov
- Year
- 2007
- Journal
- arXiv preprint
- DOI
- arXiv:0707.0170
- arXiv
- 0707.0170
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.
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