Thermally stable p-wave repulsive Fermi polaron without a two-body bound state

Abstract

We theoretically investigate the polaron physics of an impurity immersed in a two-dimensional Fermi sea, interacting via a p-wave interaction at finite temperature. In the unitary limit with a divergent scattering area, we find a well-defined repulsive Fermi polaron at short interaction range, which shows a remarkable thermal stability with increasing temperature. The appearance of such a stable repulsive Fermi polaron in the resonantly interacting limit can be attributed to the existence of a quasi-bound dressed molecule state hidden in the two-particle continuum, although there is no bound state in the two-particle limit. We show that the repulsive Fermi polaron disappears when the interaction range increases or when the scattering area is tuned to the weakly-interacting regime. The large interaction range and small scattering area instead stabilize attractive Fermi polarons.

arXiv comment9 pages, 7 figures

References in corpus (31)

• Many-Body Physics with Ultracold Gases
• Feshbach Resonances in Ultracold Gases
• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Fermi polaron-polaritons in charge-tunable atomically thin semiconductors
• Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
• Attractive and repulsive Fermi polarons in two dimensions
• Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
• Polarons, Dressed Molecules, and Itinerant Ferromagnetism in ultracold Fermi gases
• Normal state of highly polarized Fermi gases: simple many-body approaches
• Repulsive Fermi polarons in a resonant mixture of ultracold ${}^6$Li atoms
• Universal many-body response of heavy impurities coupled to a Fermi sea
• Polarons in the radio-frequency spectrum of a quasi-two-dimensional Fermi gas
• Stability of a Fully Magnetized Ferromagnetic state in Repulsively Interacting Ultracold Fermi Gases
• Repulsive polarons and itinerant ferromagnetism in strongly polarized Fermi gases
• Evidence for universal relations describing a gas with $p$-wave interactions
• Stability of the fermionic gases close to a p-wave Feshbach resonance
• Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases
• Observation of a Strong Atom-Dimer Attraction in a Mass-Imbalanced Fermi-Fermi Mixture
• Attractive Fermi polarons at nonzero temperature with finite impurityconcentration
• Dark Continuum in the Spectral Function of the Resonant Fermi Polaron
• Marginal Fermi liquid resonance induced by a quantum magnetic impurity in d-wave superconductors
• Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
• Scaling Law for Three-body Collisions in Identical Fermions with $p$-wave Interactions
• Thermal crossover, transition, and coexistence in Fermi polaronic spectroscopies
• Exact quasiparticle properties of a heavy polaron in BCS Fermi superfluids
• Fermi polarons at finite temperature: Spectral function and rf-spectroscopy
• The p-wave polaron
• Two-dimensional coherent spectroscopy of trion-polaritons and exciton-polaritons in atomically thin transition metal dichalcogenides
• Second sound with ultracold atoms: A brief historical account
• Quantum fluctuations of a resonantly interacting $p$-wave Fermi superfluid in two dimensions
• Resonantly interacting $p$-wave Fermi superfluid in two dimensions: Tan's contact and breathing mode

Cited by in corpus (5)

• Exact calculation of spectral properties of a particle interacting with a one-dimensional Fermi gas in optical lattices
• Fermi spin polaron and dissipative Fermi-polaron Rabi dynamics
• Super Fermi polaron and Nagaoka ferromagnetism in a two-dimesnional square lattice
• Spectral function of Fermi polarons at finite temperature from a self-consistent many-body $T$-matrix approach in real frequency
• Microscopic many-body theory of two-dimensional coherent spectroscopy of excitons and trions in atomically thin transition metal dichalcogenides