标题： 利用量子信息探测顶夸克 sector 的新物理 显示英文标题

标题： Probing new physics in the top sector using quantum information

摘要： 近期研究表明，量子信息论中的定量概念可以在分析对撞物理时发挥作用，包括阐明新物理。 本文中，我们在由标准模型有效场论建模的一般新物理场景中研究了各种量子信息（QI）测度，包括魔法态、迹距离和保真度距离。 我们论证了这些测度确实可以显示出与纯粹标准模型的差异，并将我们的结果与之前文献中讨论过的纠缠度类似发现进行了比较。 我们考察了不同测度在顶夸克对不变质量和散射角二维网格中的相对灵敏度，发现纠缠度、魔法态和迹距离在相空间的某些区域中各自成为最佳测度。 这突显了在寻找超出标准模型物理的过程中探索多种量子信息测度的重要性。 显示英文摘要

摘要： Recent studies have shown that quantitative concepts from quantum information theory can play a role in analysing collider physics, including elucidating new physics. In this paper, we study various QI measures including magic, trace distance and fidelity distance, in generic new physics scenarios modelled by the Standard Model Effective Field Theory. We argue that such measures can indeed show up differences with respect to the pure Standard Model, and we compare our results with similar findings for the concurrence discussed previously in the literature. We examine the relative sensitivity of different measures to new physics in two-dimensional bins of the top pair invariant mass and scattering angle, finding that the concurrence, magic and trace distance each emerge as the best measure in at least some regions of the phase space. This highlights the importance of exploring multiple quantum information measures in the hunt for beyond the Standard Model physics.