Observation of microwave shielding of ultracold molecules

Anderegg, Loïc; Burchesky, Sean; Bao, Yicheng; Yu, Scarlett S.; Karman, Tijs; Chae, Eunmi; Ni, Kang-Kuen; Ketterle, Wolfgang; Doyle, John M.

doi:10.1126/science.abg9502

Observation of microwave shielding of ultracold molecules

Journal Article · Thu Aug 12 00:00:00 EDT 2021 · Science

DOI:https://doi.org/10.1126/science.abg9502· OSTI ID:1812977

^[1]; Burchesky, Sean ^[1]; ^[1]; Yu, Scarlett S. ^[1]; ^[2]; ^[3]; ^[4]; ^[5]; ^[1]

Department of Physics, Harvard University, Cambridge, MA, USA., Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, USA.
ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA., Radboud University, Institute for Molecules and Materials, Heijendaalseweg 135, 6525 AJ Nijmegen, Netherlands.
Department of Physics, Korea University, Seongbuk-gu, Seoul, Republic of Korea.
Department of Physics, Harvard University, Cambridge, MA, USA., Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, USA., Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, USA., Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.

Harnessing the potential wide-ranging quantum science applications of molecules will require control of their interactions. Here, we used microwave radiation to directly engineer and tune the interaction potentials between ultracold calcium monofluoride (CaF) molecules. By merging two optical tweezers, each containing a single molecule, we probed collisions in three dimensions. The correct combination of microwave frequency and power created an effective repulsive shield, which suppressed the inelastic loss rate by a factor of six, in agreement with theoretical calculations. The demonstrated microwave shielding shows a general route to the creation of long-lived, dense samples of ultracold polar molecules and evaporative cooling.

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Sponsoring Organization:: USDOE

OSTI ID:: 1812977

Journal Information:: Science, Journal Name: Science Journal Issue: 6556 Vol. 373; ISSN 0036-8075

Publisher:: American Association for the Advancement of Science (AAAS)Copyright Statement

Country of Publication:: United States

Language:: English

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