We generalize the condition keeping the special states bound entangled (S.-M. Fei, X. Li-Jost, B.-Z. Sun, Phys. Lett. A 352 (2006) 321) to the general states. Taking the original 4 × 4 states as 2 × 8 states we show that they still can be bound entangled.
Physics Letters A – Elsevier
Published: May 14, 2007
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