We introduce some important matrices and their applications in quantum computation and quantum information, including density matrix, unitary matrix, etc.
介绍了量子计算与量子信息中的一些重要的矩阵及其应用，包括密度矩阵、酉矩阵等。
In this paper, backward errors for seven kinds of structured unitary matrix eigenvalue problems are discussed.
本文讨论了七类结构酉矩阵特征值问题的向后误差。
In other words, the Hermiticity of a matrix is invariant under unitary transformations.
换言之，矩阵的厄密性在幺正变换下保持不变。
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