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One particle in a box: the simplest model for a Fermigas in the unitary limit

Ludovic Pricoupenko·Yvan Castin
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Abstract

We consider a single quantum particle in a spherical box interacting with a fixed scatterer at the center, to construct a model of a degenerate atomic Fermi gas close to a Feshbach resonance. One of the key predictions of the model is the existence of two branches for the macroscopic state of the gas, as a function of the magnetic field controlling the value of the scattering length.This model is able to draw a qualitative picture of all the different features recently observed in a degenerate atomic Fermi gas close to the resonance, even in the unitary limit.

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Ludovic Pricoupenko, Yvan Castin. 2004-03-26. One particle in a box: the simplest model for a Fermigas in the unitary limit. https://doi.org/10.1103/physreva.69.051601

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