Remarks on Lewenstein-Sanpera Decomposition

Details Remarks on Lewenstein-Sanpera Decomposition Remarks on Lewenstein-Sanpera Decomposition

2000-12-28

arxiv.org/abs/quant-ph/0012145v1

Physics

Quantum Physics

Scientific paper

10.1016/S0375-9601(01)00350-4

We discuss in this letter Lewenstein-Sanpera (L-S) decomposition for a specific Werner state. Compared with the optimal case, we propose a quasi-optimal one which in the view of concurrence leads to the same entanglement measure for the entangled mixed state discussed. We think that in order to obtain entanglement of given state the optimal L-S decomposition is not necessary.

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