量子随机性引起的准经典区电子角分布的不对称性
Quantum-stochasticity-induced asymmetry in angular distribution of electrons in a quasi-classical regime
摘要：
在准经典条件下，研究了量子随机性对超相对论电子束与线偏振超强激光脉冲正面碰撞动力学的影响。一般情况下，即使在激光脉冲的有质动力作用下，电子束的角分布也保持横向对称。在这里，我们表明，当初始角发散$Δθ_i \lesssim 10^{-6} a_0^2$与$a_0$是归一化的激光场振幅，电子束的非对称角分布出现由于量子随机效应，通过模拟分别采用Landau-Lifshitz，量子修改的Landau-Lifshitz方程，量子随机辐射反应形式来描述辐射电子动力学。的不对称性是强大的对各种激光和电子参数，提供了一个实验可检测的签名的性质与激光和电子束的光子发射的量子随机性。
英文摘要：
Impacts of quantum stochasticity on the dynamics of an ultra-relativistic electron beam head-on colliding with a linearly polarized ultra-intense laser pulse are theoretically investigated in a quasi-classical regime. Generally, the angular distribution of the electron beam keeps symmetrically in transverse directions in this regime, even under the ponderomotive force of the laser pulse. Here we show that when the initial angular divergence $Δθ_i \lesssim 10^{-6} a_0^2$ with $a_0$ being the normalized laser field amplitude, an asymmetric angular distribution of the electron beam arises due to the quantum stochasticity effect, via simulations employing Landau-Lifshitz, quantum-modified Landau-Lifshitz equations, and quantum stochastic radiation reaction form to describe the radiative electron dynamics respectively. The asymmetry is robust against a variety of laser and electron parameters, providing an experimentally detectable signature for the nature of quantum stochasticity of photon emission with laser and electron beams currently available.
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