标题： 冷碰撞移位抵消和镱光晶格钟中的非弹性散射 显示英文标题

标题： Cold collision shift cancelation and inelastic scattering in a Yb optical lattice clock

摘要： 最近，p波冷碰撞被证明在171Yb光学晶格钟的钟跃迁频率的密度依赖性偏移中占主导地位。 在这里，我们展示通过在适当的激发分数下操作这种系统，冷碰撞偏移可以被抵消到5x10^{-18}的分数频率水平以下。 我们报告了3P0-3P0和1S0-3P0散射的非弹性二体损失率。 我们还测量了无极化原子样品中的相互作用偏移。 对于这种自旋-1/2的171Yb系统，碰撞测量结果对于高性能光学钟以及用于量子信息和量子模拟应用的强相互作用系统都是相关的。 显示英文摘要

摘要： Recently, p-wave cold collisions were shown to dominate the density-dependent shift of the clock transition frequency in a 171Yb optical lattice clock. Here we demonstrate that by operating such a system at the proper excitation fraction, the cold collision shift is canceled below the 5x10^{-18} fractional frequency level. We report inelastic two-body loss rates for 3P0-3P0 and 1S0-3P0 scattering. We also measure interaction shifts in an unpolarized atomic sample. Collision measurements for this spin-1/2 171Yb system are relevant for high performance optical clocks as well as strongly-interacting systems for quantum information and quantum simulation applications.