关于Fano-Anderson模型格林函数的解析结构
On the analytic structure of Green's function for the Fano - Anderson model
摘要：
研究了精确可解的Fano-Anderson模型的格林函数的解析结构。我们分析了GF极点，分支点和黎曼面，并显示如何费米的黄金法则，有效的微扰制度，不大的时间，出现在这方面。的GF在频率表示的分析结构的知识打开机会，获得公式的GF在时间表示替代标准的使用谱密度。
英文摘要：
We study analytic structure of the Green's function (GF) for the exactly solvable Fano-Anderson model. We analyze the GF poles, branch points and Riemann surface, and show how the Fermi's Golden Rule, valid in perturbative regime for not to large time, appears in this context. The knowledge of analytic structure of the GF in frequency representation opens opportunities for obtaining formulas for the GF in time representation alternative to the standard one using the spectral density.
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