Generating Vector-Vortex γ Photons by Nonlinear Compton Scattering
Abstract
Vector-vortex photons, characterized by a nonseparable coupling between polarization and orbital angular momentum (OAM), offer opportunities for optical manipulation, quantum communication, nuclear photonics, etc. However, their generation in the γ-ray regime remains challenging. Here, we put forward a novel method to generate vector-vortex γ photons via nonlinear Compton scattering in elliptically polarized laser pulses. We reveal that tailoring laser ellipticity directs the multiphoton absorption to coherently populate OAM modes with opposite winding numbers, ± ℓ, tied to orthogonal circular polarizations, producing nonseparable spin-OAM photon states. For a linearly polarized laser of moderate intensity (dimensionless amplitude a0 ∼ 1), the mode-pair concurrence--a 0-to-1 measure of spin-OAM entanglement--reaches unity for MeV γ photons, realizing maximally nonseparable radial- or azimuthal-type vector-vortex states. The laser amplitude further controls the accessible OAM spectrum. Our method offers a route to MeV vector-vortex photons, opening a new avenue for nuclear-scale structured photonics and high-energy quantum information.
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BibTeX
@misc{ren2026generating,
title = {{Generating Vector-Vortex $γ$ Photons by Nonlinear Compton Scattering}},
author = {Yong-Zheng Ren and Mamutjan Ababekri and Jun-Lin Zhou and Feng Wan and Qian Zhao and Zhong-Peng Li and Kun Xue and Ya-Qing Huang and Zhao-Hui Chen and Zhong-Feng Xu and Jian-Xing Li},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.35208},
eprint = {2609.35208},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.35208},
}
RIS
TY - UNPB
TI - Generating Vector-Vortex γ Photons by Nonlinear Compton Scattering
AU - Yong-Zheng Ren
AU - Mamutjan Ababekri
AU - Jun-Lin Zhou
AU - Feng Wan
AU - Qian Zhao
AU - Zhong-Peng Li
AU - Kun Xue
AU - Ya-Qing Huang
AU - Zhao-Hui Chen
AU - Zhong-Feng Xu
AU - Jian-Xing Li
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.35208
UR - https://arxiv.org/abs/2609.35208
AB - Vector-vortex photons, characterized by a nonseparable coupling between polarization and orbital angular momentum (OAM), offer opportunities for optical manipulation, quantum communication, nuclear photonics, etc. However, their generation in the γ-ray regime remains challenging. Here, we put forward a novel method to generate vector-vortex γ photons via nonlinear Compton scattering in elliptically polarized laser pulses. We reveal that tailoring laser ellipticity directs the multiphoton absorption to coherently populate OAM modes with opposite winding numbers, ± ℓ, tied to orthogonal circular polarizations, producing nonseparable spin-OAM photon states. For a linearly polarized laser of moderate intensity (dimensionless amplitude a_0 ∼ 1), the mode-pair concurrence--a 0-to-1 measure of spin-OAM entanglement--reaches unity for MeV γ photons, realizing maximally nonseparable radial- or azimuthal-type vector-vortex states. The laser amplitude further controls the accessible OAM spectrum. Our method offers a route to MeV vector-vortex photons, opening a new avenue for nuclear-scale structured photonics and high-energy quantum information.
ER -