Laser-cooled polyatomic molecules for improved electron electric dipole moment searches
Laser-cooled polyatomic molecules for improved electron electric dipole moment searches
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DOI：
10.1088/1367-2630/ab687b
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发表时间：
2020-02-01
影响因子：
3.3
通讯作者：
Doyle, John M.
中科院分区：
文献类型：
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作者：
Augenbraun, Benjamin L.;Lasner, Zack D.;Doyle, John M.
实现并研究了 (YbOH)-Yb-174 的多普勒和西西弗斯冷却。这种多原子分子对超出标准模型的物理具有很高的敏感性，代表了未来新型 T 违反物理的高精度探针的新物种。通过西西弗斯冷却，YbOH 梁的横向温度降低了近两个数量级，达到 < 600 mu K，相空间密度增加了 6 倍以上。我们开发了 YbOH 激光冷却的完整数值模型，并发现与数据非常吻合。我们预计，对长寿命 YbOH 分子样品进行激光冷却和磁光捕获是可以实现的，这将允许对电子的电偶极矩进行高灵敏度探测。这里演示的方法很容易推广到 YbOH 的其他同位素体，这些同位素体对其他对称性破坏的电磁矩具有增强的敏感性。
Doppler and Sisyphus cooling of (YbOH)-Yb-174 are achieved and studied. This polyatomic molecule has high sensitivity to physics beyond the Standard Model and represents a new class of species for future high-precision probes of new T-violating physics. The transverse temperature of the YbOH beam is reduced by nearly two orders of magnitude to < 600 mu K and the phase-space density is increased by a factor of > 6 via Sisyphus cooling. We develop a full numerical model of the laser cooling of YbOH and find excellent agreement with the data. We project that laser cooling and magneto-optical trapping of long-lived samples of YbOH molecules are within reach and these will allow a high sensitivity probe of the electric dipole moment of the electron. The approach demonstrated here is easily generalized to other isotopologues of YbOH that have enhanced sensitivity to other symmetry violating electromagnetic moments.