- Conference date: 6-12 March 2006
- Location: Kanpur (India)
We present a new class of entangled bipartite states. These remain positive under partial transposition, and hence live outside the jurisdiction of the Peres‐Horodecki separability criterion. Their inseparability is demonstrated using Choi‐type indecomposable positive maps. It is shown that these states are not isolated, but occupy a finite volume in the bipartite state space. It is further shown that in the space of positive maps there exists a neighborhood around the Choi map with the property that every map in this neighborhood is indecomposable.
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