论文标题

通过旋转到轨道角动量转移在非线性康普顿散射中的涡旋$γ$光子生成

Vortex $γ$ photon generation via spin-to-orbital angular momentum transfer in nonlinear Compton scattering

论文作者

Ababekri, Mamutjan, Guo, Ren-Tong, Wan, Feng, Qiao, B., Li, Zhongpeng, Lv, Chong, Zhang, Bo, Zhou, Weimin, Gu, Yuqiu, Li, Jian-Xing

论文摘要

具有固有轨道角动量(OAM)的涡旋$γ$光子在各个领域具有大量应用,例如,其一代人尚未确定,例如,刺激物理学,核物理,粒子物理学和天体物理学仍然没有解决。在这项工作中,我们通过在圆形偏振激光脉冲中的超层压电子的非线性康普顿散射来研究涡流$γ$光子的生成。我们开发了一种量子电动力学散射理论,该理论明确解决了多光子吸收和角动量转移机制。在脉冲激光场中,我们揭示了散射矩阵元件的涡旋相结构,讨论如何将涡流相传输到辐射光子上,并得出涡旋$γ$光子的辐射速率。我们通过数值检查辐射的能量光谱和梁特性,同时还研究了有限激光脉冲对发射涡流$γ$光子的角动量和能量分布的影响。

Vortex $γ$ photons with intrinsic orbital angular momenta (OAM) possess a wealth of applications in various fields, e.g.-strong-laser physics, nuclear physics, particle physics and astrophysics-yet their generation remains unsettled. In this work, we investigate the generation of vortex $γ$ photons via nonlinear Compton scattering of ultrarelativistic electrons in a circularly polarized laser pulse. We develop a quantum electrodynamics scattering theory that explicitly addresses the multiphoton absorption and the angular momentum transfer mechanism. In pulsed laser fields, we unveil the vortex phase structure of the scattering matrix element, discuss how the vortex phase could be transferred to the radiated photon, and derive the radiation rate of the vortex $γ$ photon. We numerically examine the energy spectra and beam characteristics of the radiation, while also investigating the influence of finite laser pulses on the angular momentum and energy distribution of the emitted vortex $γ$ photons.

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