论文标题
沿BEC-BCS跨界的通用相关性
Universal correlations along the BEC-BCS crossover
论文作者
论文摘要
我们表明，两体密度相关函数的长距离行为和$ t = 0 $的两个分量费米气体平衡混合物的库珀对概率密度是bec-bcs跨界的普遍性。我们的结果通过数值求解不同有限短距离原子相互作用势的平均场BCS模型来证明。我们发现相关长度的分析表达方式是在零动量下的化学势和能量差距方面。
We show that the long-distance behavior of the two-body density correlation functions and the Cooper-pair probability density of a balanced mixture of a two-component Fermi gas at $T = 0$, is universal along the BEC-BCS crossover. Our result is demonstrated by numerically solving the mean-field BCS model for different finite short-range atomic interaction potentials. We find an analytic expression for the correlation length in terms of the chemical potential and the energy gap at zero momentum.
