论文标题
后反应的经典和量子双副本
Classical and quantum double copy of back-reaction
论文作者
论文摘要
我们考虑辐射通过尺寸理论和重力横穿强平面波背景的颜色充电和巨大的颗粒发出。这些背景在整个过程中都经过精确和非扰动的处理。我们从探针粒子发出的辐射中计算出这些磁场上的后反应：通过背景耦合的全球理论经典，并在量子理论中通过三点幅度在树级别上。这两种方法的一致性是明确建立的。我们表明，仪表理论和重力振幅与平面波背景上振幅的双拷贝相关。最后，我们证明，在四维中，这些计算可以使用大型旋转螺旋形形式主义的背景修饰版进行。
We consider radiation emitted by colour-charged and massive particles crossing strong plane wave backgrounds in gauge theory and gravity. These backgrounds are treated exactly and non-perturbatively throughout. We compute the back-reaction on these fields from the radiation emitted by the probe particles: classically through background-coupled worldline theories, and at tree-level in the quantum theory through three-point amplitudes. Consistency of these two methods is established explicitly. We show that the gauge theory and gravity amplitudes are related by the double copy for amplitudes on plane wave backgrounds. Finally, we demonstrate that in four-dimensions these calculations can be carried out with a background-dressed version of the massive spinor-helicity formalism.
