论文标题
使用量身定制的激光束增强量子真空特征
Enhancing quantum vacuum signatures with tailored laser beams
论文作者
论文摘要
我们证明，量身定制的激光束提供了一种强大的手段，可以在实验中可访问的强电磁场中制作量子真空特征。旨在检测高强度边界上量子真空非线性的典型情况，设想了聚焦激光脉冲的碰撞。真空波动介导的驱动场的有效相互作用会导致编码量子真空非线性特征的信号光子。从驱动激光光子的较大背景中隔离少量信号光子是一个重大的实验挑战。当前工作的主要思想是修改驱动激光束的远场特性，以在其中心表现出无场孔，从而允许对散布在正向方向上的信号进行基本的无背景测量。我们的明确构造利用了奇特的远场/重点双重性。
We demonstrate that tailored laser beams provide a powerful means to make quantum vacuum signatures in strong electromagnetic fields accessible in experiment. Typical scenarios aiming at the detection of quantum vacuum nonlinearities at the high-intensity frontier envision the collision of focused laser pulses. The effective interaction of the driving fields mediated by vacuum fluctuations gives rise to signal photons encoding the signature of quantum vacuum nonlinearity. Isolating a small number of signal photons from the large background of the driving laser photons poses a major experimental challenge. The main idea of the present work is to modify the far-field properties of a driving laser beam to exhibit a field-free hole in its center, thereby allowing for an essentially background free measurement of the signal scattered in the forward direction. Our explicit construction makes use of a peculiar far-field/focus duality.
