Separability criteria for mixed three-qubit states
Separability criteria for mixed three-qubit states
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DOI:
10.1103/physreva.83.062337
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发表时间:
2011-01
影响因子:
2.9
通讯作者:
Szilárd Szalay
中科院分区:
文献类型:
--
作者:
Szilárd Szalay
We study the noisy GHZ-W mixture (where GHZ denotes Greenberger-Horne-Zeilinger). We demonstrate some necessary but not sufficient criteria for different classes of separability of these states. It turns out that the partial transposition criterion of Peres [Phys. Rev. Lett. 77, 1413 (1996)] and the criteria of Guehne and Seevinck [New J. Phys. 12, 053002 (2010)] dealing with matrix elements are the strongest ones for different separability classes of this two-parameter state. As a result, we determine a set of entangled states of positive partial transpose.