Quantum-stochasticity-induced asymmetry in the angular distribution of electrons in a quasiclassical regime

Quantum-stochasticity-induced asymmetry in the angular distribution of electrons in a quasiclassical regime
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准经典体系中量子随机性引起的电子角分布的不对称性

DOI:
10.1103/physreva.102.042218
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发表时间:
2020-06
期刊:
影响因子:
2.9
通讯作者:
Li Yu-Tong
Li Yu-Tong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hu Guang;Sun Wei-Qiang;Li Bing-Jun;Li Yan-Fei;Wang Wei-Min;Zhu Meng;Hu Hua-Si;Li Yu-Tong

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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$\Delta\theta_i\lesssim 10 ^{-6} a_0^2 $,$a_0 $是归一化的激光场振幅时,由于量子随机效应,电子束的非对称角分布出现,通过模拟使用Landau-Lifshitz,量子修改的Landau-Lifshitz方程,和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。
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 $\Delta \theta_i \lesssim 10^{-6} a_0^2$ 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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