Pöschl-Teller气体的配对
Pairing of the Pöschl-Teller gas
摘要：
我们报告的状态方程的模型系统的计算，代表冷费米气体，粒子通过Pöschl-Teller相互作用。在连续更复杂的计算中，我们确定相关性和非局部性的重要性。我们表明，气体显示，在相对较低的密度，不稳定性所示的发散的介质中的散射长度发生之前的真空散射长度和旋节线密度的发散。我们还计算了配对间隙，并表明，非本地相关性可以改变配对间隙几乎一个数量级。
英文摘要：
We report calculations of equation of state of a model system, representative for a cold Fermi gas, of particles interacting via the Pöschl-Teller interaction. In successively more sophisticated calculations, we determine the importance of correlations and non-localities. We show that the gas displays, at relatively low density, an instability indicated by a divergence of the in-medium scattering length which occurs well before the divergence of the vacuum scattering length and the spinodal density. We also calculate the pairing gap and show that non-local correlations can change the pairing gap by almost an order of magnitude.
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