Laser-cooled polyatomic molecules for improved electron electric dipole moment searches

被引：122
作者：
Augenbraun, Benjamin L. [1 ,2 ]
Lasner, Zack D. [1 ,2 ]
Frenett, Alexander [1 ,2 ]
Sawaoka, Hiromitsu [1 ,2 ]
Miller, Calder [1 ,2 ]
Steimle, Timothy C. [3 ]
Doyle, John M. [1 ,2 ]
机构：
[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[2] Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA
[3] Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA
来源：
NEW JOURNAL OF PHYSICS | 2020年 / 22卷 / 02期
关键词：
laser cooling; molecular laser cooling; ultracold molecules; precision measurements; electron electric dipole moment; ATOMS; SPECTRUM; BEAM;
D O I：
10.1088/1367-2630/ab687b
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：8
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