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Conditions for separability in generalized Laplacian matrices and diagonally dominant matrices as density matrices

机译:广义Laplacian矩阵和对角占优矩阵作为密度矩阵的可分离性条件

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摘要

Recently, Laplacian matrices of graphs are studied as density matrices in quantum mechanics. We continue this study and give conditions for separability of generalized Laplacian matrices of weighted graphs with unit trace. In particular, we show that the Peres-Horodecki positive partial transpose condition is necessary and sufficient for separability in C-2 circle times C-q. In addition, we present sufficient conditions for separability of generalized Laplacian matrices and diagonally dominant matrices. (c) 2005 Elsevier B.V. All rights reserved.
机译:最近,图的拉普拉斯矩阵被研究为量子力学中的密度矩阵。我们继续进行这项研究,并给出了带有单位迹线的加权图的广义Laplacian矩阵可分离性的条件。特别是,我们证明了Peres-Horodecki正部分转置条件对于C-2圈乘以C-q的可分离性是必要的和充分的。此外,我们为广义拉普拉斯矩阵和对角占优矩阵的可分离性提供了充分的条件。 (c)2005 Elsevier B.V.保留所有权利。

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