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首页> 外文期刊>The European physical journal, B. Condensed matter physics >Non-Lorentzian spectral functions for Coulomb quantum kinetics
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Non-Lorentzian spectral functions for Coulomb quantum kinetics

机译:库仑量子动力学的非洛伦兹谱函数

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摘要

Numerical solutions of the Kadanoff-Baym equations with self-energies in second Born approximation are presented for electrons in a bulk semiconductor. The results are used to analyze in detail the two-time spectral function A(p,t_1,t_2). In particular, (I) the damping of the spectral function is investigated over a broad density range both, for low and high temperatures; (II), A(p,t_1,t_2) is compared to analytical expressions-an exponential and a recently proposed inverse hyperbolic cosine decay law; (III), the two analytical spectral functions are studied with respect to conservation of total energy, where for the inverse hyperbolic cosine an improved behavior is demonstrated.
机译:对于块状半导体中的电子,给出了第二次Born近似中具有自能的Kadanoff-Baym方程的数值解。结果用于详细分析两次频谱函数A(p,t_1,t_2)。特别是,(I)在低温和高温下都在较宽的密度范围内研究了频谱函数的阻尼; (II),将A(p,t_1,t_2)与解析表达式进行比较-指数表达式和最近提出的反双曲余弦衰减定律; (III),关于总能量守恒,研究了两个解析谱函数,其中对于反双曲余弦,改进了行为。

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