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A degenerate Fermi gas of polar molecules

De Marco, Luigi and Valtolina, Giacomo and Matsuda, Kyle and Tobias, William G. and Covey, Jacob P. and Ye, Jun (2019) A degenerate Fermi gas of polar molecules. Science, 363 (6429). pp. 853-856. ISSN 0036-8075.

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Experimental realization of a quantum degenerate gas of molecules would provide access to a wide range of phenomena in molecular and quantum sciences. However, the very complexity that makes ultracold molecules so enticing has made reaching degeneracy an outstanding experimental challenge over the past decade. We now report the production of a degenerate Fermi gas of ultracold polar molecules of potassium–rubidium (KRb). Through coherent adiabatic association in a deeply degenerate mixture of a rubidium Bose-Einstein condensate and a potassium Fermi gas, we produce molecules at temperatures below 0.3 times the Fermi temperature. We explore the properties of this reactive gas and demonstrate how degeneracy suppresses chemical reactions, making a long-lived degenerate gas of polar molecules a reality.

Item Type:Article
Related URLs:
URLURL TypeDescription Materials Paper
Matsuda, Kyle0000-0001-6861-2386
Tobias, William G.0000-0002-2728-2613
Covey, Jacob P.0000-0001-5104-6883
Ye, Jun0000-0003-0076-2112
Additional Information:© 2019 American Association for the Advancement of Science. Received 9 July 2018; accepted 4 January 2019; published online 17 January 2019. We dedicate this work to the memory of Deborah Jin, whose brilliance and passion inspire us all. We thank J. Bohn, E. Cornell, C. Greene, Peiru He, M. Holland, S. Moses, and A. M. Rey for useful discussions. Funding: This work is supported by NIST, AFOSR-MURI, ARO-MURI, and the NSF JILA Physics Frontier Center (NSF PHY-1734006). Author contributions: All authors contributed to carrying out the experiments, interpreting the results, and writing the manuscript. The authors declare that they have no competing financial interests. Data and materials availability: Data from the main text and supplementary materials are available through the Harvard Dataverse at (61).
Funding AgencyGrant Number
National Institute of Standards and Technology (NIST)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Record Number:CaltechAUTHORS:20190123-081116917
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92412
Deposited By: Tony Diaz
Deposited On:23 Jan 2019 17:23
Last Modified:21 Feb 2019 21:01

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