Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1868459 | Physics Letters A | 2006 | 5 Pages |
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.
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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Chai Wah Wu,