Magnetic Trapping of an Ultracold Gas of Polar Molecules

Physical Review Letters
Daniel J McCarronDavid DeMille

Abstract

We demonstrate the efficient transfer of molecules from a magneto-optical trap into a conservative magnetic quadrupole trap. Our scheme begins with a blue-detuned optical molasses to cool SrF molecules to ≈50  μK. Next, we optically pump the molecules into a strongly trapped sublevel. This two-step process reliably transfers ≈40% of the molecules initially trapped in the magneto-optical trap into a single quantum state in the magnetic trap. Once loaded, the molecule cloud is compressed by increasing the magnetic field gradient. We observe a magnetic trap lifetime of over 1 s. This opens a promising new path to study ultracold molecular collisions, and potentially to produce quantum-degenerate molecular gases via sympathetic cooling with co-trapped atoms.

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Citations

Dec 6, 2018·Physical Review Letters·Alejandra L CollopyJun Ye
Sep 14, 2019·Science·Loïc AndereggJohn M Doyle
Sep 8, 2018·Physical Review Letters·Lawrence W CheukJohn M Doyle
Feb 24, 2019·The Journal of Chemical Physics·Masato Morita, Timur V Tscherbul
Aug 7, 2019·Physical Review Letters·Masato MoritaTimur V Tscherbul
Nov 6, 2018·Physical Review Letters·Tijs Karman, Jeremy M Hutson
Apr 18, 2020·Physical Review Letters·Louis BaumJohn M Doyle
Jul 24, 2020·Physical Review Letters·Roman BauseXin-Yu Luo
Aug 17, 2020·Physical Review Letters·Lawrence W CheukJohn M Doyle
Feb 29, 2020·Physical Review Letters·L CaldwellM R Tarbutt
Aug 7, 2019·Physical Review Letters·L CaldwellM R Tarbutt
Jan 2, 2021·International Journal of Molecular Sciences·Luigi SantamariaPasquale Maddaloni
Aug 14, 2021·Science·Loïc AndereggJohn M Doyle
Apr 2, 2020·The Journal of Physical Chemistry. a·Ephriem Tadesse MengeshaJohn Doyle

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