期刊
ATOMS
卷 11, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/atoms11010003
关键词
polaron; exciton-polariton; Feshbach resonance
This article studies the quasiparticle properties of two-dimensional strongly interacting Bose polarons in atomic Bose-Einstein condensates and polariton gases, using the non-self consistent T-matrix approximation. For the atomic case, the spectral and quasiparticle properties of the polaron in the presence of a magnetic Feshbach resonance are studied. Additionally, a polaron arising from the dressing of a single itinerant electron by a quantum fluid of polaritons in a semiconductor microcavity is also investigated. The properties of these polarons can be controlled by tuning the cavity mode.
Polarons are quasiparticles relevant across many fields in physics: from condensed matter to atomic physics. Here, we study the quasiparticle properties of two-dimensional strongly interacting Bose polarons in atomic Bose-Einstein condensates and polariton gases. Our studies are based on the non-self consistent T-matrix approximation adapted to these physical systems. For the atomic case, we study the spectral and quasiparticle properties of the polaron in the presence of a magnetic Feshbach resonance. We show the presence of two polaron branches: an attractive polaron, a low-lying state that appears as a well-defined quasiparticle for weak attractive interactions, and a repulsive polaron, a metastable state that becomes the dominant branch at weak repulsive interactions. In addition, we study a polaron arising from the dressing of a single itinerant electron by a quantum fluid of polaritons in a semiconductor microcavity. We demonstrate the persistence of the two polaron branches whose properties can be controlled over a wide range of parameters by tuning the cavity mode.
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