On the structure of entanglement witnesses and new class of positive indecomposable maps

Physics – Quantum Physics

Scientific paper

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18 pages

Scientific paper

We construct a new class of positive indecomposable maps in the algebra of 'd
x d' complex matrices. Each map is uniquely characterized by a cyclic
bistochastic matrix. This class generalizes a Choi map for d=3. It provides a
new reach family of indecomposable entanglement witnesses which define
important tool for investigating quantum entanglement.

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