Two-dimensional repulsive Fermi polarons with short- A nd long-range interactions
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10.1103/PhysRevA.100.023608
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/175468
Tipus de documentArticle
Data publicació2019-08-09
EditorAmerican Physical Society (APS)
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
We study the repulsive polaron problem in a two-component two-dimensional system of fermionic atoms. We use two different interaction models: a short-range (hard-disk) potential and a dipolar potential. In our approach, all the atoms have the same mass and we consider the system to be composed of a uniform bath of a single species and a single atomic impurity. We use the diffusion Monte Carlo method to evaluate polaron properties such as its chemical potential and pair distribution functions, together with a discussion on the deficit of volume induced by the impurity.We also evaluate observables that allow us to determine the validity of the quasiparticle picture: the quasiparticle residue and the effective mass of the polaron. Employing two different potentials allows us to identify the universality regime, where the properties depend only on the gas parameter na2s fixed by the bath density and the two-dimensional scattering length.
CitacióBombin, R. [et al.]. Two-dimensional repulsive Fermi polarons with short- A nd long-range interactions. "Physical review A", 9 Agost 2019, vol. 100, p. 023608-1-023608-9.
ISSN2469-9926
Versió de l'editorhttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.100.023608
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