发表机构
Duke University; IonQ Inc.; University of British Columbia（杜克大学; IonQ公司; 不列颠哥伦比亚大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次实验演示了偶极-声子量子逻辑作为光谱工具，利用CaO$^+$-Ca$^+$离子链的共享运动模式测量CaO$^+$基态$\Omega$双重态分裂，确定频率为$2\pi\times454\pm1$ kHz，并给出耦合下界。
AI 中文摘要
偶极-声子量子逻辑（DPQL）为分子离子量子比特中的量子信息制备、测量和控制提供了新颖的方法。本文报告了DPQL作为光谱工具首次实验演示，利用CaO$^+$-Ca$^+$离子链的共享运动模式测量了CaO$^+$基态$\Omega$双重态的频移分裂。通过比较三个陷阱频率扫描范围内的偶极-声子信号，我们确定分裂为$\omega_{mol}=2\pi\times454\pm1$ kHz，并对有效偶极-声子耦合设定了下界。观测速率受限于分子基态转动能级中较低的热布居。
英文摘要
Dipole-phonon quantum logic (DPQL) offers novel approaches for state preparation, measurement, and control of quantum information in molecular ion qubits. Here we report the first experimental demonstration of DPQL as a spectroscopic tool using the shared motional mode of a CaO$^+$-Ca$^+$ ion chain to measure the frequency splitting of the ground $Ω$-doublet of CaO$^+$. By comparing the dipole-phonon signal across three trap-frequency ramp ranges, we determine the splitting to be $ω_{mol}=2π\times454\pm1$ kHz and place a lower bound on the effective dipole-phonon coupling. The rate of observation is limited by the low thermal population in the molecular ground rotational state.
Comments13 pages, 7 figures
