Single-experiment-detectable multipartite entanglement witness for ensemble quantum computing
Single-experiment-detectable multipartite entanglement witness for ensemble quantum computing
复制标题
DOI：
10.1103/physreva.75.032317
复制
发表时间：
2006-08
影响因子：
2.9
通讯作者：
R. Rahimi;A. Saitoh;M. Nakahara;M. Kitagawa
中科院分区：
文献类型：
--
作者：
R. Rahimi;A. Saitoh;M. Nakahara;M. Kitagawa
在本文中，我们提供了一个可操作的方法来检测多体纠缠在基于集合的量子计算。这种方法是基于纠缠见证的概念。我们分解的纠缠证人为每一类的多体纠缠到非本地操作，除了本地测量。单个量子比特的测量是同时进行的，因此纠缠的完整检测是在单次运行的实验中进行的。从这个意义上说，我们的方案是上级的一般使用的纠缠证人，需要大量的实验和量子态的副本的准备检测纠缠。
In this paper we provide an operational method to detect multipartite entanglement in ensemble-based quantum computing. This method is based on the concept of the entanglement witness. We decompose the entanglement witness for each class of multipartite entanglement into nonlocal operations in addition to local measurements. Individual single-qubit measurements are performed simultaneously; hence complete detection of entanglement is performed in a single-run experiment. In this sense, our scheme is superior to the generally used entanglement witnesses that require a number of experiments and preparation of copies of quantum state for detection of entanglement.