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- W2765226148 abstract "We characterize properties of the so-called repulsive polaron across the recently discovered orbital Feshbach resonance in alkaline-earth(-like) atoms. Being a metastable quasiparticle excitation at the positive energy, the repulsive polaron is induced by the interaction between an impurity atom and a Fermi sea. By analyzing in detail the energy, the polaron residue, the effective mass, and the decay rate of the repulsive polaron, we reveal interesting features that are intimately related to the two-channel nature of the orbital Feshbach resonance. In particular, we find that the life time of the repulsive polaron is non-monotonic in the Zeeman-field detuning bewteen the two channels, and has a maximum on the BEC-side of the resonance. Further, by considering the stability of a mixture of the impurity and the majority atoms against phase separation, we show that the itin- erant ferromagnetism may exist near the orbital Feshbach resonance at appropriate densities. Our results can be readily probed experimentally, and have interesting implications for the observation of itinerant ferromagnetism near an orbital Feshbach resonance." @default.
- W2765226148 created "2017-11-10" @default.
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- W2765226148 date "2018-01-30" @default.
- W2765226148 modified "2023-10-18" @default.
- W2765226148 title "Repulsive polarons in alkaline-earth-metal-like atoms across an orbital Feshbach resonance" @default.
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- W2765226148 doi "https://doi.org/10.1103/physreva.97.013635" @default.
- W2765226148 hasPublicationYear "2018" @default.
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