标题： 带纠缠探测粒子的Bhabha散射中的纠缠分发 显示英文标题

标题： Entanglement distribution in Bhabha scattering with entangled spectator particle

摘要： 我们分析了在Bhabha散射过程$(e^-e^+\rightarrow e^-e^+)$中纠缠是如何生成和分布的，在树级水平下。 在我们的设置中，一个电子$A$与一个正电子$B$发生散射，该正电子最初与另一个电子$C$（旁观者）纠缠，该电子不直接参与该过程。 我们发现，QED散射以一种非平凡的方式在三个粒子之间生成和分布纠缠：输出通道$AB$、$AC$和$BC$中的关联性被详细研究，作为散射参数和初始纠缠权重的函数。 尽管是在一个特定情况下得出的结果，但我们的结果表现出其他类似QED散射过程的一些一般特性，对于这些过程，目前的分析扩展是直接的。 显示英文摘要

摘要： We analyze how entanglement is generated and distributed in a Bhabha scattering process $(e^-e^+\rightarrow e^-e^+)$ at tree level. In our setup an electron $A$ scatters with a positron $B$, which is initially entangled with another electron $C$ (spectator), that does not participate directly to the process. We find that the QED scattering generates and distributes entanglement in a non-trivial way among the three particles: the correlations in the output channels $AB$, $AC$ and $BC$ are studied in detail as functions of the scattering parameters and of the initial entanglement weight. Although derived in a specific case, our results exhibit some general features of other similar QED scattering processes, for which the extension of the present analysis is straightforward.