稀疏玻色子系统的关联高斯方法
Correlated Gaussian method for dilute bosonic systems
摘要：
弱相互作用的玻色气体通常用平均场近似的Gross-Pitaevskii方程来描述。然而，平均场近似有一定的局限性，特别是它不能描述粒子之间的关联。我们在这里介绍一种替代变分方法，相关高斯方法的基础上，在其最简单的形式是快速和简单的平均场近似，但它允许连续改进的试验波函数，包括粒子之间的相关性。
英文摘要：
The weakly interacting trapped Bose gases have been customarily described using the mean-field approximation in the form of the Gross-Pitaevskii equation. The mean-field approximation, however, has certain limitations, in particular it can not describe correlations between particles. We introduce here an alternative variational approach, based on the correlated Gaussian method, which in its simplest form is as fast and simple as the mean-field approximation, but which allows successive improvements of the trial wave-function by including correlations between particles.
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