吸引相互作用费米子的一维囚禁气体的同位旋激发
Isospin excitations of a trapped 1D gas of attractively interacting fermions
摘要：
本文考虑抛物型外势场中具有短程吸引相互作用的费米子气体，导出了局域密度近似的条件。所得到的准粒子（同位旋）激发谱显示出等距离的低能级，这相当于一个线性的动量依赖性，是从根本上不同于普通的狄拉克谱在空间均匀的情况下。
英文摘要：
We consider a gas of fermions with a short-range attractive intercomponent interaction in a parabolic external potential and derive the conditions of the local density approximation. The obtained spectrum of quasiparticle (isospin) excitations shows equidistant low-energy levels, which is equivalent to a linear momentum dependence and is fundamentally different from the ordinary Dirac spectrum in the spatially uniform case.
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