2017/10/31 by Junjun Xu, Ran Qi · 4 citations
Physics and Astronomy · #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Effective mass (spring–mass system) #Electron #Excitation #Excited state #Feshbach resonance #Ground state #Molecule #Physics #Physics of Superconductivity and Magnetism #Polaron #Quantum mechanics #Quantum, superfluid, helium dynamics #Resonance (particle physics) #cond-mat.quant-gas
paper · pdf · doi:10.1140/epjd/e2018-90010-6
published in The European Physical Journal D 72(4) (Springer Science+Business Media) · 5 pages, 5 figures
openalex publication_date 2018/04/01 · arxiv created 2018/04/20 · arxiv updated 2018/04/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the impurity problem in an orbital Feshbach resonance (OFR), with a single excited clock state |e\uparrow⟩ atom immersed in a Fermi sea of electronic ground state |g\downarrow⟩. We calculate the polaron effective mass and quasi-particle residue, as well as the polaron to molecule transition. By including one particle-hole excitation in the molecular state, we find significant correction to the transition point. This transition point moves toward the BCS side for increasing particle densities, which suggests that the corresponding many-body physics is similar to a narrow resonance.