arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.03040quant-ph
收藏

纯三重态纠缠类的实验识别

Experimentally identifying the entanglement class of pure tripartite states

Amandeep Singh, Kavita Dorai, Arvind

摘要:

我们使用纠缠度作为纠缠度量,在核磁共振(NMR)量子信息处理器上实验证明了任意三比特纯态的纠缠分类.实验计算了任意三比特纯态在三种不同的二分态下的纠缠度,揭示了该态的纠缠性质。实验涉及测量泡利算子的期望值。这是通过将期望的期望值映射到单个量子位的局部$z$磁化上来实现的。我们在27个不同的类属态上测试了纠缠分类协议,并成功地检测了它们的纠缠类。利用全量子态层析技术构造了各态的实验层析图,并计算了各态的负性,验证了实验结果。

英文摘要:

We use concurrence as an entanglement measure and experimentally demonstrate the entanglement classification of arbitrary three-qubit pure states on a nuclear magnetic resonance (NMR) quantum information processor. Computing the concurrence experimentally under three different bipartitions, for an arbitrary three-qubit pure state, reveals the entanglement class of the state. The experiment involves measuring the expectation values of Pauli operators. This was achieved by mapping the desired expectation values onto the local $z$ magnetization of a single qubit. We tested the entanglement classification protocol on twenty seven different generic states and successfully detected their entanglement class. Full quantum state tomography was performed to construct experimental tomographs of each state and negativity was calculated from them, to validate the experimental results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑