AI 中文总结
本研究利用磁性保罗阱稳定悬浮YIG球，分析其稳定性并观测到模式耦合，室温下获Q因子~25、本征频率15.8Hz和17.2Hz，估算得耦合系数超1，有望应用于量子信息领域。
AI 中文摘要
磁悬浮可为大质量物体提供被动悬浮，可用于先进惯性传感器、生成非经典宏观运动态，以及开展量子力学对低能引力的桌面测试。磁子是自旋波的量子，可耦合多种物理量，即便在室温下也能与电磁场强耦合。本研究展示了利用磁性保罗阱对小型YIG（钇铁石榴石）球的稳定捕获；对磁性保罗阱进行了经典稳定性分析，给出了所有机械自由度的稳定性图，表明 librational（摆动）模式与平动模式间的耦合会改变稳定区域；实验中在室温下成功悬浮软磁材料钇铁石榴石，获得约25的品质因子（Q-factors），以及15.8Hz和17.2Hz的 secular frequencies（本征频率）；还对质心运动与激发磁子模式间可实现的增强耦合进行了数值估算，结果显示即便存在强机械阻尼，耦合系数（cooperativity）仍高于1，表明其在量子信息处理、量子互连及量子存储器领域具有潜在应用价值。
英文摘要
Magnetic levitation offer passive levitation of massive objects for use in advanced inertia sensors, for the generation of non-classical macroscopic motional states, and towards the table-top testing of low energy gravity with quantum mechanics. Magnons, a quanta of spin wave, couple to many physical quantities and strongly to electromagnetic fields, even at room temperature. In this work we demonstrate the stable trapping of a small YIG sphere using a magnetic Paul trap. We present a classical stability analysis of a magnetic Paul trap and show the stability diagram for all mechanical degrees of freedom. We show that coupling between librational and translational modes changes the stability region. We experimentally levitate the soft magnet yttrium iron garnet at room temperature obtaining Q-factors of $\sim25$ and secular frequencies $15.8$ Hz and $17.2$ Hz. We provide numerical estimates of the achievable enhanced coupling between the center-of-mass motion and excited magnon modes, with a cooperativity above unity despite strong mechanical damping, indicating potential applications in quantum information processing, quantum interconnects and quantum memories.
Comments8 pages, 4 figures
