Generalized Circulant Densities and a Sufficient Condition for Separability

Details Generalized Circulant Densities and a Sufficient Condition for Separability Generalized Circulant Densities and a Sufficient Condition for Separability

2008-08-26

arxiv.org/abs/0808.3597v1

J. Phys. A: Math. Theor. 41 (2008) 385301

Physics

Quantum Physics

15 pages

Scientific paper

10.1088/1751-8113/41/38/385301

In a series of papers with Kossakowski, the first author has examined properties of densities for which the positive partial transpositrionm (PPT) property can be readily checked. These densities were also investigated from a different perspective by Baumgartner, Hiesmayr and Narnhofer. In this paper we show how the support of such densities can be expressed in terms of lines in a finite geometry and how that same structure lends itself to checking the necessary PPT condition and to a novel sufficient condition for separability.

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