ITERATIVE ANALYTIC CONTINUATION OF THE ELECTRON SELF-ENERGY TO THE REAL AXIS
ITERATIVE ANALYTIC CONTINUATION OF THE ELECTRON SELF-ENERGY TO THE REAL AXIS
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DOI：
10.1103/physrevb.37.4965
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发表时间：
1988-04-01
影响因子：
3.7
通讯作者：
CARBOTTE, JP
中科院分区：
文献类型：
--
作者：
MARSIGLIO, F;SCHOSSMANN, M;CARBOTTE, JP
超导状态下的电子绿色函数既可以在虚轴沿着的离散松原频率下求解，也可以在真实的轴沿着的连续变量下求解。前者比后者计算起来方便得多。我们推导出一个形式上精确的解析延拓的真实的频率轴的解的双轴。该程序适用于更一般的问题，涉及绿色的功能。我们将此方法应用于超导铅的隧穿态密度的计算。
The electron Green’s function in the superconducting state can be solved either at discrete Matsubara frequencies along the imaginary axis, or as a function of a continuous variable along the real frequency axis. The former is considerably more convenient to calculate than the latter. We derive a formally exact analytic continuation of the imaginary-axis solutions to the real frequency axis. The procedure is applicable to more general problems involving Green’s functions. We apply our method to calculating the tunneling density of states for superconducting lead.