点击次数：

论文类型：期刊论文

发表时间：2016-04-04

发表刊物：PHYSICAL REVIEW A

收录刊物：SCIE

卷号：93

期号：4

ISSN号：2469-9926

摘要：Usually, the three-tangle of a tripartite pure state of qubits can be directly measured with the simultaneous preparation of a not-less-than fourfold copy of the state. We show that the exact genuine tripartite entanglement for (2 circle times 2 circle times n)-dimensional pure quantum states can be measured in a similar manner, provided that only two simultaneous copies of the state are available. Lower bounds are also proposed for more convenient experimental operations. As an example, a comprehensive demonstration of the scheme is provided for the three-tangle of a three-qubit state.