原子玻色气体理论中红外发散的恢复
Resummation of infrared divergencies in the theory of atomic Bose gases
摘要：
我们提出了一个一般的强耦合的方法来描述原子玻色气体超越Bogoliubov近似，当红外发散开始发生，需要精确地计算。我们考虑玻色气体的几个重要物理性质的确定，即化学势，接触，声速，凝聚密度，有效的原子间相互作用和三体复合率。它示出了如何的方法可以系统地改进与重整化群的方法，以及它如何减少到Bogoliubov理论中的弱耦合限制。
英文摘要：
We present a general strong-coupling approach for the description of an atomic Bose gas beyond the Bogoliubov approximation, when infrared divergences start to occur that need to be resummed exactly. We consider the determination of several important physical properties of the Bose gas, namely the chemical potential, the contact, the speed of sound, the condensate density, the effective interatomic interaction and the three-body recombination rate. It is shown how the approach can be systematically improved with renormalization-group methods and how it reduces to the Bogoliubov theory in the weak-coupling limit.
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