Wang Yunliang, Shukla P K, Eliasson B
International Centre for Advanced Studies in Physical Sciences and Institute for Theoretical Physics, Faculty of Physics and Astronomy, Ruhr University Bochum, D-44780 Bochum, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Feb;87(2):023105. doi: 10.1103/PhysRevE.87.023105. Epub 2013 Feb 25.
We present a theory for the quantum-electrodynamical (QED) parametric scattering instability of an intense photon pulse in an incoherent radiation background. The pump electromagnetic (EM) wave can decay into a scattered daughter EM wave and an acousticlike wave due to the QED vacuum polarization nonlinearity. By a linear instability analysis we obtain a nonlinear dispersion relation for the growth rate of the scattering instability. The nonlinear QED scattering instability can give rise to the exchange of orbital angular momentum between intense Laguerre-Gaussian mode photon pulses and the two daughter waves, which may be a useful method to detect the highly energetic photon gases existing in the vicinity of rotating dense bodies in the Universe, such as pulsars and magnetars. The observation of the scattered waves may reveal information about the twisted acoustic waves in the incoherent photon gas.
我们提出了一种关于强光子脉冲在非相干辐射背景下的量子电动力学（QED）参量散射不稳定性的理论。由于QED真空极化非线性，泵浦电磁（EM）波可以衰变成一个散射的子EM波和一个类声波。通过线性不稳定性分析，我们得到了散射不稳定性增长率的非线性色散关系。非线性QED散射不稳定性可以导致强拉盖尔 - 高斯模光子脉冲与两个子波之间的轨道角动量交换，这可能是一种检测宇宙中旋转致密天体（如脉冲星和磁星）附近存在的高能光子气体的有用方法。对散射波的观测可能揭示非相干光子气体中扭曲声波的信息。
