2016/08/31 by Jinge Chen, Jin-Ge Chen, Tian-Shu Deng +2 · 2 citations
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Excited state #Feshbach resonance #Ground state #Hyperfine structure #Molecule #Physics #Polaron #Quantum mechanics #Resonance (particle physics) #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.94.053627
published as Phys. Rev. A 94, 053627 (2016) · 8 pages, 6 figures
openalex publication_date 2016/11/28 · arxiv created 2016/11/29 · arxiv updated 2016/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the impurity problem in a gas of 173Yb atoms near the recently discovered orbital Feshbach resonance. In an orbital Feshbach resonance, atoms in the electronic ground state 1S0 interact with those in the long-lived excited 3P0 state with magnetically tunable interactions. We consider an impurity atom with a given hyperfine spin in the 3P0 state interacting with a single-component Fermi sea of atoms in the ground 1S0 manifold. Close to the orbital Feshbach resonance, the impurity can induce collective particle-hole excitations out of the Fermi sea, which can be regarded as the polaron state. As the magnetic field decreases, a molecular state becomes the ground state of the system. We show that a polaron to molecule transition exists in 173Yb atoms close to the orbital Feshbach resonance. Furthermore, due to the spin-exchange nature of the orbital Feshbach resonance, the formation of both the polaron and the molecule involve spin-flipping processes with interesting density distributions among the relevant hyperfine spin states. We show that the polaron to molecule transition can be detected using Raman spectroscopy.