Direct laser cooling of a symmetric top molecule

doi:10.1126/science.abc5357

GSTDTAP > 气候变化

DOI	10.1126/science.abc5357
	Direct laser cooling of a symmetric top molecule
	Debayan Mitra; Nathaniel B. Vilas; Christian Hallas; Loïc Anderegg; Benjamin L. Augenbraun; Louis Baum; Calder Miller; Shivam Raval; John M. Doyle
	2020-09-11
发表期刊	Science
出版年	2020
英文摘要	Experimental progress over the past few decades has led to the mastery of ultracold atomic gases. A major thrust of current research is to extend this success to ultracold molecules, which would open qualitatively new perspectives for quantum information science, precision measurement, quantum chemistry, and other fields. The internal degrees of freedom in molecules preclude immediate implementation of conventional methods. Using a specific combination of rovibronic optical transitions, Mitra et al. report direct Sisyphus laser cooling of the symmetric top molecule CaOCH3 to temperatures below 1 millikelvin (see the Perspective by Hudson). The proposed scheme for cooling is potentially applicable to a wide range of nonlinear polyatomic molecules. Science , this issue p. [1366][1]; see also p. [1304][2] Ultracold polyatomic molecules have potentially wide-ranging applications in quantum simulation and computation, particle physics, and quantum chemistry. For atoms and small molecules, direct laser cooling has proven to be a powerful tool for quantum science in the ultracold regime. However, the feasibility of laser-cooling larger, nonlinear polyatomic molecules has remained unknown because of their complex structure. We laser-cooled the symmetric top molecule calcium monomethoxide (CaOCH3), reducing the temperature of ~104 molecules from 22 ± 1 millikelvin to 1.8 ± 0.7 millikelvin in one dimension and state-selectively cooling two nuclear spin isomers. These results demonstrate that the use of proper ro-vibronic transitions enables laser cooling of nonlinear molecules, thereby opening a path to efficient cooling of chiral molecules and, eventually, optical tweezer arrays of complex polyatomic species. [1]: /lookup/doi/10.1126/science.abc5357 [2]: /lookup/doi/10.1126/science.abd1657
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/294099
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Debayan Mitra,Nathaniel B. Vilas,Christian Hallas,et al. Direct laser cooling of a symmetric top molecule[J]. Science,2020.
APA	Debayan Mitra.,Nathaniel B. Vilas.,Christian Hallas.,Loïc Anderegg.,Benjamin L. Augenbraun.,...&John M. Doyle.(2020).Direct laser cooling of a symmetric top molecule.Science.
MLA	Debayan Mitra,et al."Direct laser cooling of a symmetric top molecule".Science (2020).