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Optical lattice clocks toward 10~(17) uncertainty

机译:光学晶格时钟趋向于10〜(17)不确定度

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摘要

We discuss two possible configurations for optical lattice clocks; a one-dimensional (1D) lattice loaded with spin-polarized fermions, and a three-dimensional (3D) lattice loaded with bosons. In the former scheme, collisional frequency shifts are suppressed by the quantum statistical property of identical fermions. This Pauli blocking of collisions is critically dependent on the degree of spin polarization of the fermionic atoms, which we carefully investigated in the Rabi excitation process of the clock transition. In the latter scheme, a single occupancy lattice suppresses bunching of bosons and collisional frequency shifts. We demonstrate a frequency comparison of these two optical lattice clocks based on fermionic ~(87)Sr and bosonic ~(88)Sr. Operating these clocks parallely has yielded a stability approaching 10~(-17). Such measurements are an important step to ascertain the lattice clocks' uncertainty at the 10~(-17) level and beyond.
机译:我们讨论了光学晶格时钟的两种可能的配置。一个装有自旋极化费米子的一维(1D)晶格,以及一个装有玻色子的三维(3D)晶格。在前一种方案中,碰撞频移被相同费米子的量子统计特性所抑制。 Pauli碰撞的阻碍主要取决于铁离子原子的自旋极化程度,我们在时钟跃迁的Rabi激发过程中对此进行了仔细研究。在后一种方案中,单个占用晶格可抑制玻色子的聚集和碰撞频移。我们展示了基于铁离子〜(87)Sr和硼离子〜(88)Sr的这两个光学晶格时钟的频率比较。并行操作这些时钟产生的稳定性接近10〜(-17)。这样的测量是确定晶格时钟在10〜(-17)或更高水平的不确定性的重要步骤。

著录项

  • 来源
    《Time and frequency metrology II》|2009年|P.74310I.1-74310I.8|共8页
  • 会议地点 San Diego CA(US)
  • 作者单位

    Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, Japan 113-8656 CREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan 332-0012;

    rnDepartment of Applied Physics, Graduate School of Engineering, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, Japan 113-8656 CREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan 332-0012;

    rnCREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan 332-0012;

    rnDepartment of Applied Physics, Graduate School of Engineering, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, Japan 113-8656 CREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan 332-0012;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 时间与频率计量;
  • 关键词

    atomic clock; frequency metrology; optical lattice clock; quantum statistics;

    机译:原子钟频率计量光学晶格时钟量子统计;

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