Ultracold Fermionic Feshbach Molecules ofNa<mml:mprescripts/><mml:none/>23K<mml:mprescripts/><mml:none/>40

2012/06/21 by Cheng-Hsun Wu, Jee Woo Park, Peyman Ahmadi +2 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Binding energy #Cold Atom Physics and Bose-Einstein Condensates #Degenerate energy levels #Dipole #Excited state #Feshbach resonance #Ground state #Molecule #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Singlet state #cond-mat.quant-gas #physics.atom-ph

paper · pdf · doi:10.1103/physrevlett.109.085301

published as Phys. Rev. Lett. 109, 085301 (2012) · 5 pages, 4 figures

arxiv created 2012/06/21 · openalex publication_date 2012/08/20 · arxiv updated 2012/09/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report on the formation of ultracold weakly bound Feshbach molecules of 23Na40K, the first fermionic molecule that is chemically stable in its absolute ground state. The lifetime of the nearly degenerate molecular gas exceeds 100 ms in the vicinity of the Feshbach resonance. The measured dependence of the molecular binding energy on the magnetic field demonstrates the open-channel character of the molecules over a wide field range and implies significant singlet admixture. This will enable efficient transfer into the singlet vibrational ground state, resulting in a stable molecular Fermi gas with strong dipolar interactions.

Citations

• Reactions of ultracold alkali-metal dimers
• Feshbach resonances in ultracold gases
• Emergence of a molecular Bose–Einstein condensate from a Fermi gas
• Strongly interacting isotopic Bose-Fermi mixture immersed in a Fermi sea
• Radio-frequency transitions on weakly bound ultracold molecules
• Feshbach resonances with large background scattering length: Interplay with open-channel resonances
• Heteronuclear molecules in an optical dipole trap
• On the use of windows for harmonic analysis with the discrete Fourier transform
• Bose-Einstein Condensation of Molecules
• Observation of Bose-Einstein Condensation of Molecules

Cited by

• Realizing Fractional Chern Insulators in Dipolar Spin Systems
• Induced interactions in a superfluid Bose-Fermi mixture