Jilin Normal University Journal

KdV Description in Fermi-Einstein Condensates

Suo Nan-ji

Published Jan 1, 2016• 0 citations

Abstract

It was studied that superfluid Fermi gas in a two-dimensional solitary wave pulses in the mean-field theory for superfluid gas under limiting conditions unitarity regional and BEC regions in this paper. By using the transverse perturbation method,a( Kd V) equation for the nonlinear electron acoustic solitary waves was derived.It was found that the amplitude,width and scattering length of the solitary waves were depended on the parameters.

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Jilin Normal University Journal

KdV Description in Fermi-Einstein Condensates

Suo Nan-ji

Published Jan 1, 2016• 0 citations

OpenAlex

Abstract

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{k}_{F}|a|⪡1

with

a

the

s

-wave scattering length and

{k}_{F}

the Fermi momentum, through the unitarity limit ${k}_{F}a\ensuremath{\rightarrow}\ifmmode\pm\else\textpm\fi{}\ensuremath{\infty}$ to the Bose-Einstein condensation (BEC) regime where

{k}_{F}a>0

. The energy of our model is parametrized using the known asymptotic behavior in the BCS, BEC, and the unitarity limits and is in excellent agreement with accurate Green's-function Monte Carlo calculations. The model generates good results for frequencies of collective breathing oscillations of a trapped Fermi superfluid.