Polarons and Molecules in a Fermi Gas with Orbital Feshbach Resonance

Abstract

We study the impurity problem in a gas of ${}^{173}$Yb atoms near the recently discovered orbital Feshbach resonance. In an orbital Feshbach resonance, atoms in the electronic ground state ${}^1{S}_0$ interact with those in the long-lived excited ${}^3{P}_0$ state with magnetically tunable interactions. We consider an impurity atom with a given hyperfine spin in the ${}^3{P}_0$ state interacting with a single-component Fermi sea of atoms in the ground ${}^1{S}_0$ 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. While as tuning toward the BEC regime of the resonance, a molecular state becomes the ground state of the system. We show that a polaron to molecule transition exists in ${}^{173}$Yb 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.

arXiv comment8 pages, 6 figures

References in corpus (35)

• Feshbach Resonances in Ultracold Gases
• An Optical Lattice Clock with Accuracy and Stability at the $10^{-18}$ Level
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
• Attractive and repulsive Fermi polarons in two dimensions
• Polarons, Dressed Molecules, and Itinerant Ferromagnetism in ultracold Fermi gases
• Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetism
• Observation of two-orbital spin-exchange interactions with ultracold SU(N)-symmetric fermions
• Collective Oscillations of an Imbalanced Fermi Gas: Axial Compression Modes and Polaron Effective Mass
• Exact SO(5) Symmetry in spin 3/2 fermionic system
• Degenerate Fermi Gases of Ytterbium
• Ultra-cold Polarized Fermi Gases
• Systematic study of the ${}^{87}$Sr clock transition in an optical lattice
• Direct observation of coherent inter-orbital spin-exchange dynamics
• Observation of an orbital interaction-induced Feshbach resonance in 173-Yb
• Alkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers
• Itinerant ferromagnetism of a repulsive atomic Fermi gas: a quantum Monte Carlo study
• A strongly interacting gas of two-electron fermions at an orbital Feshbach resonance
• Possibility of an ultra-precise optical clock using the $6^1{S}_0\to 6^3{P}_0^o$ transition in ${}^{171,173}$Yb atoms held in an optical lattice
• Stability of a Fully Magnetized Ferromagnetic state in Repulsively Interacting Ultracold Fermi Gases
• Systematic study of Optical Feshbach Resonances in an ideal gas
• Orbital Feshbach Resonance in Alkali-Earth Atoms
• Properties of metastable alkaline-earth-metal atoms calculated using an accurate effective core potential
• Controlling Condensate Collapse and Expansion with an Optical Feshbach Resonance
• Trimers, molecules and polarons in imbalanced atomic Fermi gases
• Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
• Analytical theory of the dressed bound state in highly polarized Fermi gases
• Polarons in Ultracold Fermi Superfluids
• Polaronic atom-trimer continuity in three-component Fermi gases
• An impurity in a Fermi sea on a narrow Feshbach resonance: A variational study of the polaronic and dimeronic branches
• Polarons and dressed molecules near narrow Feshbach resonances
• Orbital Feshbach Resonance: A "Wide" Narrow Resonance for Higher Transition Temperature Fermi Superfluid
• Molecule and polaron in a highly polarized two-dimensional Fermi gas with spin-orbit coupling
• Three-component Ultracold Fermi Gases with Spin-Orbit Coupling

Cited by in corpus (18)

• Universal many-body response of heavy impurities coupled to a Fermi sea
• Observation of coherent multiorbital polarons in a two-dimensional Fermi gas
• Observation of a smooth polaron-molecule transition in a degenerate Fermi gas
• Interaction Control of Ultracold Alkaline-Earth Atoms
• Fermi polaron revisited: polaron-molecule transition and coexistence
• A strongly interacting Sarma superfluid near orbital Feshbach resonances
• Nature of polaron-molecule transition in Fermi polarons
• Repulsive polarons in alkaline-earth(-like) atoms across an orbital Feshbach resonance
• Topological Fulde-Ferrell states in alkaline-earth-metal-like atoms near an orbital Feshbach resonance
• Emergence of Crystalline Few-body Correlations in Mass-imbalanced Fermi Polarons
• Tuning Feshbach resonance in cold atomic gases with inter-channel coupling
• Mobile Spin Impurity in an Optical Lattice
• A Non-Gaussian Variational Approach to Fermi Polarons in One- and Two-dimensional Lattices
• Frustrated orbital Feshbach resonances in a Fermi gas
• Competing few-body correlations in ultracold Fermi polarons
• Polaronic and dressed molecular states in orbital Feshbach resonances
• Enhanced Fulde-Ferrell-Larkin-Ovchinnikov and Sarma superfluid states near an orbital Feshbach resonance
• Composite polaron formed on surface of two-dimensional lattice system in weak coupling regime