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arXiv · 2604.13724

Manipulation of Superposed Vortex States of $\gamma$ Photon via Nonlinear Compton Scattering

Jun-Lin Zhou·Mamutjan Ababekri·Yong-Zheng Ren·Yu Wang·Ren-Tong Guo·Zhao-Hui Chen·Yu-Han Kou·Zhong-Peng Li·Jian-Xing Li
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Abstract

Vortex $\gamma$ photons in superposition states have important applications in photonuclear, high-energy, and strong-field physics. However, their controlled generation in the $\gamma$-ray regime remains a great challenge. Here, we put forward a novel method for the generation of vortex $\gamma$ photon in superposition states, with controllable orbital angular momentum (OAM) separation $\Delta\ell^\prime$ and modal weights, via nonlinear Compton scattering driven by multifrequency circularly polarized laser fields. We develop a strong-field quantum electrodynamics (QED) framework to reveal the underlying mechanism and calculate the radiation probabilities. In our method, the superposition arises from interference between energy-degenerate multiphoton pathways carrying distinct OAM. For two-frequency fields, the OAM separation follows $\Delta\ell'=\nu\mp1$ (upper/lower sign for equal/opposite helicities), and modal weights are tunable by laser intensities, with $\nu$ the frequency ratio. Vortex $\gamma$ photons in controllable superposition states from our method have significant applications in strong-field QED and nuclear photonics.

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Jun-Lin Zhou, Mamutjan Ababekri, Yong-Zheng Ren, Yu Wang, Ren-Tong Guo, Zhao-Hui Chen, Yu-Han Kou, Zhong-Peng Li, Jian-Xing Li. 2026-04-15. Manipulation of Superposed Vortex States of $\gamma$ Photon via Nonlinear Compton Scattering. https://arxiv.org/abs/2604.13724

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