论文标题
Kohn-Luttinger非关联问题的一般解决方案
General solution to the Kohn-Luttinger nonconvergence problem
论文作者
论文摘要
提出了一种简单但一般的解决方案，即针对Kohn-Luttinger问题，即有限温度多体扰动理论的不相关，其零温对应物在某些情况下温度降低至零。通过使用高达扰动理论的第五顺序来说明如何通过更改参考波函数来避免这种非关联。
A simple, but general solution is proposed for the Kohn-Luttinger problem, i.e., the nonconvergence of the finite-temperature many-body perturbation theory with its zero-temperature counterpart as temperature is lowered to zero under some circumstances. How this nonconvergence can be avoided by altering the reference wave function is illustrated numerically by using up to the fifth order of the perturbation theory.
