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首页> 外文期刊>Physical review letters >Magnetic Field-Induced Spectroscopy of Forbidden Optical Transitions with Application to Lattice-Based Optical Atomic Clocks
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Magnetic Field-Induced Spectroscopy of Forbidden Optical Transitions with Application to Lattice-Based Optical Atomic Clocks

机译:禁止的光跃迁的磁场感应光谱学及其在基于格的​​光原子钟中的应用

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摘要

We develop a method of spectroscopy that uses a weak static magnetic field to enable direct optical excitation of forbidden electric-dipole transitions that are otherwise prohibitively weak. The power of this scheme is demonstrated using the important application of optical atomic clocks based on neutral atoms confined to an optical lattice. The simple experimental implementation of this method—a single clock laser combined with a dc magnetic field—relaxes stringent requirements in current lattice-based clocks (e.g., magnetic field shielding and light polarization), and could therefore expedite the realization of the extraordinary performance level predicted for these clocks. We estimate that a clock using alkaline-earth-like atoms such as Yb could achieve a fractional frequency uncertainty of well below 10~(-17) for the metrologically preferred even isotopes.
机译:我们开发了一种使用弱静态磁场的光谱方法,可以对禁止的电偶极子跃迁进行直接的光激发,否则这些跃迁会非常弱。使用基于限制在光学晶格中的中性原子的光学原子钟的重要应用,证明了该方案的强大功能。这种方法的简单实验实现(单个时钟激光器与dc磁场相结合)放宽了当前基于晶格的时钟的严格要求(例如,磁场屏蔽和光偏振),因此可以加快实现非凡性能水平的过程预测这些时钟。我们估计,对于计量上优选的均匀同位素,使用类似Yb之类的碱土类原子的时钟可以实现小于10〜(-17)的分数频率不确定性。

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