Optoelectrical Cooling of Polar Molecules to Submillikelvin Temperatures.
Phys Rev Lett
; 116(6): 063005, 2016 Feb 12.
Article
em En
| MEDLINE
| ID: mdl-26918988
ABSTRACT
We demonstrate direct cooling of gaseous formaldehyde (H2CO) to the microkelvin regime. Our approach, optoelectrical Sisyphus cooling, provides a simple dissipative cooling method applicable to electrically trapped dipolar molecules. By reducing the temperature by 3 orders of magnitude and increasing the phase-space density by a factor of â¼10(4), we generate an ensemble of 3×10(5) molecules with a temperature of about 420 µK, populating a single rotational state with more than 80% purity.
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2016
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Article