论文标题
三叉戟对激光脉冲的创建：共振，阈值和载体信封相位效应
Trident pair creation by a train of laser pulses: Resonance, threshold, and carrier envelope phase effects
论文作者
论文摘要
为在存在激光脉冲的存在下发生的过程提供了强场量子电动力学领域中的一般公式，在树级的存在下，由两种vertex feynman图表示，并交换了虚拟光子。在这些一般设置中还提出了在相应概率分布中检索共振的方案。虽然提出的形式主义适用于各种过程，例如电子峰值对创建和歼灭，莫勒散射，巴巴散射等，但我们将其说明用于三叉戟过程。具体而言，我们考虑在MUON-激光场碰撞中创建电子峰值对。我们证明，概率分布表现出接近成对创建阈值的可集成奇点。同样，观察到各种共振源自Feynman Photon传播器的极点。尽管这些共振通常被强量子干扰所掩盖，但我们表明可以通过更改驱动激光脉冲的载体包络阶段来隔离它们。在这种情况下，虽然可以转变为Lorentz-Breit-wigner形状曲线，但可以确定共振位置和宽度。
General formulation in the realm of strong-field quantum electrodynamics is provided for a process that occurs in the presence of a train of laser pulses and, in the tree level, is represented by a two-vertex Feynman diagram with exchange of a virtual photon. A scheme of retrieving resonances in the corresponding probability distributions is also formulated in these general settings. While the presented formalism is applicable to a variety of processes like electron-positron pair creation and annihilation, Möller scattering, Bhabha scattering, etc., we illustrate it for a trident process. Specifically, we consider electron-positron pair creation in the muon--laser-field collisions. We demonstrate that the probability distributions exhibit integrable singularities close to the threshold of pair creation. Also, a variety of resonances is observed that originate from the poles of the Feynman photon propagator. While those resonances are, in general, obscured by strong quantum interferences, we show that they can be isolated by changing the carrier envelope phase of the driving laser pulses. In that case, while transformed into the Lorentz-Breit-Wigner shape profile, the resonance position and width can be determined.
