Article ID Journal Published Year Pages File Type
1868459 Physics Letters A 2006 5 Pages PDF
Abstract

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 C2⊗CqC2⊗Cq. In addition, we present sufficient conditions for separability of generalized Laplacian matrices and diagonally dominant matrices.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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