Ultracold Dipolar Gas of Fermionic [superscript 23]Na[superscript 40]K Molecules in Their Absolute Ground State
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PhysRevLett.114.205302.pdf
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Author(s)
Park, Jee Woo
Will, Sebastian
Zwierlein, Martin Wolfram
Date Issued
May 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Park, Jee Woo, Sebastian A. Will, and Martin W. Zwierlein. "Ultracold Dipolar Gas of Fermionic [superscript 23]Na[superscript 40]K Molecules in Their Absolute Ground State." Phys. Rev. Lett. 114, 205302 (May 2015). © American Physical Society
Version
Final published version
Abstract
We report on the creation of an ultracold dipolar gas of fermionic [superscript 23]Na[superscript 40]Kmolecules in their absolute rovibrational and hyperfine ground state. Starting from weakly bound Feshbach molecules, we demonstrate hyperfine resolved two-photon transfer into the singlet X[superscript 1]Σ[superscript +]|v = 0,J = 0⟩ ground state, coherently bridging a binding energy difference of 0.65 eV via stimulated rapid adiabatic passage. The spin-polarized, nearly quantum degenerate molecular gas displays a lifetime longer than 2.5 s, highlighting NaK’s stability against two-body chemical reactions. A homogeneous electric field is applied to induce a dipole moment of up to 0.8 D. With these advances, the exploration of many-body physics with strongly dipolar Fermi gases of [superscript 23]Na[superscript 40]K molecules is within experimental reach.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.114.205302
