相对论性多普勒效应：普适光谱和泽秒脉冲
Relativistic Doppler effect: universal spectra and zeptosecond pulses
摘要：
本文报道了由于多普勒效应，相对论强飞秒激光脉冲从过密等离子体振荡边界反射产生的泽秒脉冲训练的数值观测。这些脉冲有望成为一种独特的实验和技术工具，因为它们的长度是玻尔半径的数量级，强度是非常高的$\propto 10^{19}$ W/cm $^2$。我们提出的物理机制，分析理论，并直接粒子在细胞模拟。我们证明了谐波谱的普适性：对于$n < 4γ^2$，$n$次谐波强度为$1/n^{p}$，其中$γ$是电子流体边界的最大$γ$因子，对于宽带和准单色激光脉冲，分别为$p=3$和$p=5/2$.
英文摘要：
We report on a numerical observation of the train of zeptosecond pulses produced by reflection of a relativistically intense femtosecond laser pulse from the oscillating boundary of an overdense plasma because of the Doppler effect. These pulses promise to become a unique experimental and technological tool since their length is of the order of the Bohr radius and the intensity is extremely high $\propto 10^{19}$ W/cm$^2$. We present the physical mechanism, analytical theory, and direct particle-in-cell simulations. We show that the harmonic spectrum is universal: the intensity of $n$th harmonic scales as $1/n^{p}$ for $n < 4γ^2$, where $γ$ is the largest $γ$--factor of the electron fluid boundary, $p=3$ and $p=5/2$ for the broadband and quasimonochromatic laser pulses respectively.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
