Sequential state discrimination with quantum correlation
Sequential state discrimination with quantum correlation
复制标题
具有量子相关性的顺序状态辨别
DOI：
10.1007/s11128-018-2033-4
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发表时间：
2018
影响因子：
2.5
通讯作者：
Liang Mai Lin
中科院分区：
文献类型：
--
作者：
Zhang Jin Hua;Zhang Fu Lin;Liang Mai Lin
研究了两个状态在任意先验概率下的顺序无模糊状态判别（SSD），并与经典通信的三种策略进行了比较。偏离等概率有助于所有考虑的任务的成功。当认为至少有一方成功时，概率克隆协议上级其他协议，这在等先验概率的特殊情况下是不存在的。我们还研究了量子关联在SSD中的作用，并表明该过程需要不和谐，但拒绝纠缠。左和右不一致分别对应于第一个观察者提取的信息部分和留给他的继任者的信息部分。先验概率的不平衡扩大了它们的相对差异。
The sequential unambiguous state discrimination (SSD) of two states prepared in arbitrary prior probabilities is studied and compared with three strategies that allow classical communication. The deviation from equal probabilities contributes to the success in all the tasks considered. When one considers at least one of the parties succeeds, the protocol with probabilistic cloning is superior to others, which is not observed in the special case with equal prior probabilities. We also investigate the roles of quantum correlations in SSD and show that the procedure requires discords but rejects entanglement. The left and right discords correspond to the part of information extracted by the first observer and the part left to his successor, respectively. Their relative difference is extended by the imbalance of prior probabilities.