2017/08/31 by Luis Riegger, Nelson Darkwah Oppong, Moritz Höfer +5 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Fermion #Magnetic moment #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #Spin (aerodynamics) #Ultracold atom #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevlett.120.143601
published as Phys. Rev. Lett. 120, 143601 (2018)
openalex publication_date 2018/04/04 · arxiv created 2018/04/05 · arxiv updated 2018/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on the experimental realization of a state-dependent lattice for a two-orbital fermionic quantum gas with strong interorbital spin exchange. In our state-dependent lattice, the ground and metastable excited electronic states of 173Yb take the roles of itinerant and localized magnetic moments, respectively. Repulsive on-site interactions in conjunction with the tunnel mobility lead to spin exchange between mobile and localized particles, modeling the coupling term in the well-known Kondo Hamiltonian. In addition, we find that this exchange process can be tuned resonantly by varying the on-site confinement. We attribute this to a resonant coupling to center-of-mass excited bound states of one interorbital scattering channel.