Observation of coherent multiorbital polarons in a two-dimensional Fermi gas

Abstract

We report on the experimental observation of multiorbital polarons in a two-dimensional Fermi gas of ${}^{173}\mathrm{Yb}$ atoms formed by mobile impurities in the metastable ${}^3{\mathrm{P}}_0$ orbital and a Fermi sea in the ground-state ${}^1{\mathrm{S}}_0$ orbital. We spectroscopically probe the energies of attractive and repulsive polarons close to an orbital Feshbach resonance and characterize their coherence by measuring the quasiparticle residue. For all probed interaction parameters, the repulsive polaron is a long-lived quasiparticle with a decay rate more than 2 orders of magnitude below its energy. We formulate a many-body theory, which accurately treats the interorbital interactions in two dimensions and agrees well with the experimental results. Our work paves the way for the investigation of many-body physics in multiorbital ultracold Fermi gases.

6 pages, 4 figures; Supplementary Material

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Cited by in corpus (42)

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• Fate of the Bose polaron at finite temperature
• Observation of non-linearity of generalized King plot in the search for new boson
• Quantum Dynamics of Attractive and Repulsive Polarons in a Doped MoSe${}_2$ Monolayer
• Non-Hermitian Squeezed Polarons
• Equation of State and Thermometry of the 2D SU($N$) Fermi-Hubbard Model
• Polaron Problems in Ultracold Atoms: Role of a Fermi Sea across Different Spatial Dimensions and Quantum Fluctuations of a Bose Medium
• Probing transport and slow relaxation in the mass-imbalanced Fermi-Hubbard model
• Life and death of the Bose polaron
• High-precision numerical solution of the Fermi polaron problem and large-order behavior of its diagrammatic series
• Renormalization group study of Bose polarons
• Tunable Feshbach resonances and their spectral signatures in bilayer semiconductors
• Thermodynamic signatures of the polaron-molecule transition in a Fermi gas
• Interorbital Interactions in an SU(2)xSU(6)-Symmetric Fermi-Fermi Mixture
• The strongly driven Fermi polaron
• Effect of fermion indistinguishability on optical absorption of doped two-dimensional semiconductors
• Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
• Quantum Monte Carlo simulations of two-dimensional repulsive Fermi gases with population imbalance
• Intersections of ultracold atomic polarons and nuclear clusters: How is a chart of nuclides modified in dilute neutron matter?
• Fermi polaron in low-density spin-polarized neutron matter
• Rabi oscillations and magnetization of a mobile spin-1/2 impurity in a Fermi sea
• Fermionic matter-wave quantum optics with cold-atom impurity models
• Variational approach to the two-dimensional Bose polaron
• Exact Quantum Virial Expansion for the Optical Response of Doped Two-Dimensional Semiconductors
• Fermi spin polaron and dissipative Fermi-polaron Rabi dynamics
• Universal properties of dipolar Bose polarons in two dimensions
• Universal quantum dynamics of Bose polarons
• Observation of Magnon-Polarons in the Fermi-Hubbard Model
• Probing polaron clouds by Rydberg atom spectroscopy
• Decoherence and momentum relaxation in Fermi-polaron Rabi dynamics: a kinetic equation approach
• Few-body solutions under spin-exchange interaction: magnetic bound state and the Kondo screening effect
• Functional renormalisation group approach to the finite-temperature Bose polaron
• Scattering resonances and pairing in a Rabi-coupled Fermi gas
• Medium-enhanced polaron repulsion in a dilute Bose mixture
• Hybrid-pair superfluidity in a strongly driven Fermi gas
• Repulsive Fermi and Bose Polarons in Quantum Gases
• Dissipation Driven Coherent Dynamics Observed in Bose-Einstein Condensates
• Signatures of the orthogonality catastrophe in a coherently driven impurity
• Offset sideband locking to iodine for laser cooling on the ${}^1{\mathrm{S}}_0\to {}^3{\mathrm{P}}_1$ transition of ${}^{171}\mathrm{Yb}$
• Bose Polaron in a quantum fluid of light
• Phenomenological model of decaying Bose polarons