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论文类型：期刊论文

发表时间：2008-01-13

发表刊物：Physical Review A - Atomic, Molecular, and Optical Physics

收录刊物：EI

卷号：77

期号：2

ISSN号：10502947

摘要：A genuine tripartite entanglement monotone is presented for (2 2 n)-dimensional tripartite pure states, obtained by introducing an entanglement measure for bipartite pure states. As an application, we consider the genuine tripartite entanglement of the ground state of the exactly solvable isotropic spin- 1/2 chain with three-spin interaction. It is shown that the singular behavior of the genuine tripartite entanglement exactly signals a quantum phase transition. © 2008 The American Physical Society.