强相互作用区费米气体的基态性质
Ground State Properties of Fermi Gases in the Strongly Interacting Regime
摘要：
在不知道超流费米气体波函数的情况下，用量子蒙特卡罗方法计算了超流费米气体的基态能量和对能隙。然而，这样的知识是必不可少的预测这些气体的其他属性，如密度矩阵和对分布函数。提出了一种新的、简单的方法，利用格林函数蒙特卡罗方法优化量子流体的波函数。它被用来计算费米气体的对分布函数和势能的整个制度，从原子的Bardeen-Cooper-Schrieffer超流体的分子玻色-爱因斯坦凝聚，跨越作为相互作用强度的变化。
英文摘要：
The ground state energies and pairing gaps in dilute superfluid Fermi gases have now been calculated with the quantum Monte Carlo method without detailed knowledge of their wave functions. However, such knowledge is essential to predict other properties of these gases such as density matrices and pair distribution functions. We present a new and simple method to optimize the wave functions of quantum fluids using Green's function Monte Carlo method. It is used to calculate the pair distribution functions and potential energies of Fermi gases over the entire regime from atomic Bardeen-Cooper-Schrieffer superfluid to molecular Bose-Einstein condensation, spanned as the interaction strength is varied.
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