Many Fermi polarons at nonzero temperature

Abstract

An extremely polarized mixture of an ultracold Fermi gas is expected to reduce to a Fermi polaron system, which consists of a single impurity immersed in the Fermi sea of majority atoms. By developing a many-body T -matrix theory, we investigate spectral properties of the polarized mixture in experimentally relevant regimes in which the system of finite impurity concentration at nonzero temperature is concerned. We explicitly demonstrate presence of polaron physics in the polarized limit and discuss effects of many polarons in an intermediate regime in a self-consistent manner. By analyzing the spectral function at finite impurity concentration, we extract the attractive and repulsive polaron energies. We find that a renormalization of majority atoms via an interaction with minority atoms and a thermal depletion of the impurity chemical potential are of significance to depict the many-polaron regime.

17 pages, 10 figures, revised version accepted by New Journal of Physics

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Cited by in corpus (39)

• Boiling a Unitary Fermi Liquid
• Interacting Polaron-Polaritons
• Observation of a smooth polaron-molecule transition in a degenerate Fermi gas
• Effective approach to impurity dynamics in one-dimensional trapped Bose gases
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• Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
• Repulsive Fermi Polarons and Their Induced Interactions in Binary Mixtures of Ultracold Atoms
• Many-body quantum dynamics and induced correlations of Bose polarons
• Dissipative correlated dynamics of a moving impurity immersed in a Bose-Einstein Condensate
• Thermal crossover, transition, and coexistence in Fermi polaronic spectroscopies
• Polaron Problems in Ultracold Atoms: Role of a Fermi Sea across Different Spatial Dimensions and Quantum Fluctuations of a Bose Medium
• Correlated quantum dynamics of two quenched fermionic impurities immersed in a Bose-Einstein Condensate
• Crossover polarons in a strongly interacting Fermi superfluid
• Fermi polarons at finite temperature: Spectral function and rf-spectroscopy
• Breakdown of the Fermi polaron description near Fermi degeneracy at unitarity
• Fermi polaron revisited: polaron-molecule transition and coexistence
• Mesoscopic spin transport between strongly interacting Fermi gases
• Quasiparticle properties of a single alpha particle in cold neutron matter
• Thermodynamic signatures of the polaron-molecule transition in a Fermi gas
• Correlated dynamics of fermionic impurities induced by the counterflow of an ensemble of fermions
• Bose polaron in spherical trap potentials: Spatial structure and quantum depletion
• Intersections of ultracold atomic polarons and nuclear clusters: How is a chart of nuclides modified in dilute neutron matter?
• Radiofrequency spectroscopy of one-dimensional trapped Bose polarons: crossover from the adiabatic to the diabatic regime
• Binding two and three $\alpha$ particles in cold neutron matter
• The ground state of polaron in an ultracold dipolar Fermi gas
• Mobile impurity probing a two-dimensional superfluid phase transition
• Collisional dynamics of polaronic clouds immersed in a Fermi sea
• Polaronic Proton and Diproton Clustering in Neutron-Rich Matter
• Finite-range effects in the two-dimensional repulsive Fermi polaron
• Brueckner $G$-matrix approach to two-dimensional Fermi gases with the finite-range attractive interaction
• Non-Hermitian Ferromagnetism in an Ultracold Fermi Gas
• Bose polaron in spherically symmetric trap potentials: Ground states with zero and lower angular momenta
• Entangling lattice-trapped bosons with a free impurity: impact on stationary and dynamical properties
• Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group
• Extracting non-local inter-polaron interactions from collisional dynamics
• Repulsive Fermi and Bose Polarons in Quantum Gases
• Spectral function of Fermi polarons at finite temperature from a self-consistent many-body $T$-matrix approach in real frequency
• Super Fermi polaron and Nagaoka ferromagnetism in a two-dimesnional square lattice
• The normal state of attractive Fermi gases from coupled-cluster theory