Magnetic trapping of ultracold molecules at high density
- URL: http://arxiv.org/abs/2211.11120v2
- Date: Sat, 26 Nov 2022 23:04:24 GMT
- Title: Magnetic trapping of ultracold molecules at high density
- Authors: Juliana J. Park, Yu-Kun Lu, Alan O. Jamison and Wolfgang Ketterle
- Abstract summary: We report magnetic trapping of NaLi molecules in the triplet ground state at high density and ultralow temperature.
This allows studies on both atom-molecule and molecule-molecule collisions in the ultracold regime.
We demonstrate sympathetic cooling of NaLi molecules in the magnetic trap by radio frequency evaporation of co-trapped Na atoms.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Trapping ultracold molecules in conservative traps is essential for
applications -- such as quantum state-controlled chemistry, quantum
simulations, and quantum information processing. These applications require
high densities or phase-space densities. We report magnetic trapping of NaLi
molecules in the triplet ground state at high density ($\approx 10^{11} \;
\rm{cm}^{-3}$) and ultralow temperature ($\approx 1\;{\rm \mu K}$). Magnetic
trapping at these densities allows studies on both atom-molecule and
molecule-molecule collisions in the ultracold regime in the absence of trapping
light, which has often lead to undesired photo-chemistry. We measure the
inelastic loss rates in a single spin sample and spin-mixtures of fermionic
NaLi as well as spin-stretched NaLi$+$Na mixtures. We demonstrate sympathetic
cooling of NaLi molecules in the magnetic trap by radio frequency evaporation
of co-trapped Na atoms and observe an increase in the molecules' phase-space
density by a factor of $\approx 16$.
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