Weaker entanglement guarantees stronger entanglement

Details Weaker entanglement guarantees stronger entanglement Weaker entanglement guarantees stronger entanglement

2011-02-02

arxiv.org/abs/1102.0439v3

Phys. Rev. A 84, 012325 (2011)

Physics

Quantum Physics

5 pages, 1 table, 1 figure. The paper has been totally rewritten according to the comments from editors

Scientific paper

10.1103/PhysRevA.84.012325

The monogamy of entanglement is one of the basic quantum mechanical features, which says that when two partners Alice and Bob are more entangled then either of them has to be less entangled with the third party. Here we qualitatively present the converse monogamy of entanglement: given a tripartite pure system and when Alice and Bob are weakly entangled, then either of them is generally strongly entangled with the third party. Our result leads to the classification of tripartite pure states based on bipartite reduced density operators, which is a novel and effective way to this long-standing problem compared to the means by stochastic local operations and classical communications. We also systematically indicate the structure of the classified states and generate them.

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