发表机构
University of California Los Angeles（加州大学洛杉矶分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
通过时域测量发现Yb+离子亚稳态寿命达17.8分钟，并找到701nm再泵浦跃迁，可用于量子信息处理。
AI 中文摘要
我们通过对囚禁的$\mathrm{Yb}^+$离子进行直接的时域测量发现，激发态${}^3[11/2]_{9/2}^o$的无碰撞寿命为17.8(6)分钟，足以用于原子钟或量子信息处理。我们定位并基准测试了一个位于$701\\, \mathrm{nm}$的宽“再泵浦”跃迁，该跃迁能轻易地将布居数转移回与基态的Doppler冷却循环中，这可能允许对亚稳态流形中的子结构进行量子非破坏测量。利用双稳态Coulomb晶体压力计，我们发现背景气体对该亚稳态${}^3[11/2]_{9/2}^o$流形的碰撞淬灭比${}^2\mathrm{F}_{7/2}^o$更有效，但尽管如此，在我们装置的基础压力下，我们观察到平均寿命超过10分钟。
英文摘要
We find through direct, time-domain measurement of trapped $\mathrm{Yb}^+$ ions that the excited ${}^3[11/2]_{9/2}^o$ state has a collision-free lifetime of 17.8(6) min, long enough for use in atomic clockwork or quantum information processing. We locate and benchmark a broad ``repump'' transition at $701\, \mathrm{nm}$ that readily transfers population back into the Doppler cooling cycle with the ground state, which may allow for quantum nondemolition measurement of sub-structure in the metastable manifold. Using a bi-stable Coulomb-crystal manometer, we find that the collisional quenching of this metastable ${}^3[11/2]_{9/2}^o$ manifold by background gas is more efficient than for ${}^2\mathrm{F}_{7/2}^o$, but nonetheless we observe an average lifetime exceeding 10 minutes at the base pressure of our apparatus.
Comments4 pages, 4 figures
