Improved entanglement detection with subspace witnesses
Improved entanglement detection with subspace witnesses
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DOI：
10.1103/physreva.101.012319
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发表时间：
2019-11
影响因子：
2.9
通讯作者：
Won Kyu Calvin Sun;Alexandre Cooper;P. Cappellaro
中科院分区：
文献类型：
--
作者：
Won Kyu Calvin Sun;Alexandre Cooper;P. Cappellaro
介绍了一种比典型的基于状态保真度的纠缠“子空间”见证，并在金刚石中由电子自旋组成的混合双量子比特系统上进行了实验测试。它的直接实现提供了改进的检测特定的真正的多部纠缠态在噪声，中等规模的量子处理器。
A ``subspace'' witness of entanglement, more robust than a typical state fidelity-based witness, is introduced and experimentally tested with a hybrid two-qubit system composed of electronic spins in diamond. Its straightforward implementation offers improved detection of specific genuine multipartite entangled states in noisy, intermediate-scale quantum processors.