Bell inequalities versus entanglement and mixedness for a class of two - qubit states

Details Bell inequalities versus entanglement and mixedness for a class of two - qubit states Bell inequalities versus entanglement and mixedness for a class of two - qubit states

2004-02-17

arxiv.org/abs/quant-ph/0402112v1

Physics Letters A 328(2004), 26-35

Physics

Quantum Physics

11 pages

Scientific paper

10.1016/j.physleta.2004.06.007

For a class of mixed two -qubit states we show that it is not possible to discriminate between states violating or non - violating Bell - CHSH inequalities, knowing only their entanglement and mixedness. For a large set of possible values of these quantities, we construct pairs of states with the same entanglement and mixedness such that one state is violating but the other is non - violating Bell - CHSH inequality.

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