标题： 超越领先阶的量子断层扫描 显示英文标题

标题： Quantum tomography beyond the leading order

摘要： 量子层析成像作为一种探素量子力学基础方面的重要工具，依赖于从角分布中提取自旋信息。 这本质上是一种最低阶的技术，在高阶修正显著时定义不清。 对于这些情况，我们建议将高阶修正视为背景，并以与其他背景相同的方式对其进行建模和从数据中扣除。 我们通过希格斯衰变$H \to ZZ \to e^+ e^- \mu^+ \mu^-$来展示这一过程，该过程对于大型强子对撞机即将进行的三重态纠缠测试具有重要意义。 显示英文摘要

摘要： Quantum tomography, as a tool to probe foundational aspects of quantum mechanics, relies on extracting spin information from angular distributions. This is inherently a leading-order technique, ill-defined when higher-order corrections are significant. For those cases, we propose to treat higher-order corrections as a background, to be modeled and subtracted from data in the same way as other backgrounds are. We illustrate this procedure for Higgs decays $H \to ZZ \to e^+ e^- \mu^+ \mu^-$, which is of high interest for upcoming qutrit entanglement tests at the Large Hadron Collider.