论文标题
量子不和谐和转向LHC的顶级夸克
Quantum discord and steering in top quarks at the LHC
论文作者
论文摘要
最近，顶级夸克是一个有前途的系统，可以在可用的最高能量量表上研究量子信息。当前的研究线主要讨论诸如纠缠，非局部性或量子断层扫描等主题。在这里，我们通过研究量子不和谐和转向来提供顶级夸克中量子相关性的完整图。我们发现这两种现象都存在于LHC上。特别是，有望在可分离的量子状态下以高统计意义检测到量子不一致。有趣的是，由于测量过程的奇异性质，可以按照其原始定义来测量量子不和谐，并且可以在实验中重建转向椭圆形，这两个测量都可以在常规设置中进行高度需求。与纠缠相反，量子不和谐和转向的不对称性质可以为$ cp $ violating物理的证人超出标准模型。
Top quarks have been recently shown to be a promising system to study quantum information at the highest-energy scale available. The current lines of research mostly discuss topics such as entanglement, Bell nonlocality or quantum tomography. Here, we provide the full picture of quantum correlations in top quarks by studying also quantum discord and steering. We find that both phenomena are present at the LHC. In particular, quantum discord in a separable quantum state is expected to be detected with high-statistical significance. Interestingly, due to the singular nature of the measurement process, quantum discord can be measured following its original definition, and the steering ellipsoid can be experimentally reconstructed, both highly-demanding measurements in conventional setups. In contrast to entanglement, the asymmetric nature of quantum discord and steering can provide witnesses of $CP$-violating physics beyond the Standard Model.
