论文标题
改进了具有LHC顶部的纠缠和铃铛不平等测试
Improved tests of entanglement and Bell inequalities with LHC tops
论文作者
论文摘要
我们讨论了LHC的顶级生产中的量子纠缠。在$ t \ bar t $阈值附近，通过抑制$ q \ bar q $子流程的贡献来增强纠缠可观察物，这是通过对实验室框架中$ t \ bar t $系统速度的简单降低来实现的。此外，我们设计了新的可观察物，这些可直接测量$ t \ bar t $旋转相关系数的相关组合涉及的纠缠和贝尔不等式。结果，统计灵敏度得到增强，对于接近阈值的贝尔不等式，统计灵敏度高达7倍。
We discuss quantum entanglement in top pair production at the LHC. Near the $t \bar t$ threshold, entanglement observables are enhanced by suppressing the contribution of $q \bar q$ subprocesses, which is achieved by a simple cut on the velocity of the $t \bar t$ system in the laboratory frame. Furthermore, we design new observables that directly measure the relevant combinations of $t\bar t$ spin correlation coefficients involved in the measurement of entanglement and Bell inequalities. As a result, the statistical sensitivity is enhanced, up to a factor of 7 for Bell inequalities near threshold.
