AI 中文总结
针对硬X射线核存储按需读取的机械复杂度问题，提出混合式磁-多普勒核频率梳，通过同步反转磁场与吸收体速度实现高效按需读取，降低了机械复杂度。
AI 中文摘要
硬X射线波段的核量子存储器相比光学同类产品具备更宽带宽、更低背景噪声等关键优势。多普勒频率梳协议已从理论上提出（X. Zhang等人，Phys. Rev. Lett. 123, 250504 (2019)），近期也通过实验得到验证（S. Velten等人，Sci. Adv. 10, eadn9825 (2024)），可用于X射线光子的存储与读取。但实现按需读取仍具挑战，因为需要多个吸收体进行精确且同步的机械运动。本文提出一种混合式磁-多普勒核频率梳，由具有核自旋简并解除的多普勒频移共振吸收体构成，可扩展多普勒梳结构。通过同步反转磁场方向与吸收体速度方向，该系统实现时间反演相位演化动力学，能高效完成光子按需读取，同时大幅降低机械复杂度。
英文摘要
Nuclear quantum memories in the hard X-ray regime offer some key advantages over their optical counterparts, such as broader bandwidth and lower background noise. A Doppler frequency comb protocol has been theoretically proposed [X. Zhang \textit{et al.}, Phys. Rev. Lett. \textbf{123}, 250504 (2019)] and recently demonstrated experimentally [S. Velten \textit{et al.}, Sci. Adv. \textbf{10}, eadn9825 (2024)] for the storage and retrieval of X-ray photons. However, achieving on-demand retrieval remains challenging because of the requirement for precise and synchronous mechanical motion of multiple absorbers. We propose a hybrid, magnetic-Doppler nuclear frequency comb composed of Doppler-shifted resonant absorbers with lifted nuclear spin degeneracy, which expands the Doppler comb structure. By synchronously reversing the directions of both the magnetic fields and absorber velocities, the system achieves time-reversed phase evolution dynamics that allows for efficient on-demand photon retrieval with significantly reduced mechanical complexity.
