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

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

2003-08-18

arxiv.org/abs/cond-mat/0308341v3

Physical Review A 69 (2004) 051601 (R)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevA.69.051601

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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