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Multidimensional Fourier spectroscopy of semiconductors. I. Nonequilibrium Green function approach

机译:半导体的多维傅里叶光谱。一,非平衡格林函数方法

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摘要

We develop a framework for describing the two-dimensional Fourier spectroscopy of semiconductors based on nonequilibrium Green functions. A perturbative treatment of the electromagnetic field is used to derive a closed set of differential equations for the multiparticle correlation functions, which take into account the many-body effects up to the third order in the field. A diagrammatic method is also developed to describe the driving of the many-body system by the three optical pulses. The method retains all features of the double-sided Feynman diagrams for bookkeeping the excitation scenario, and complements it by allowing for the description of interactions as well. Rules for the diagrams are also derived.
机译:我们开发了一个框架,用于描述基于非平衡格林函数的半导体二维傅里叶光谱。使用电磁场的扰动处理为多粒子相关函数导出一组封闭的微分方程,其中考虑了该场中直到三阶的多体效应。还开发了一种图解方法来描述三个光脉冲对多体系统的驱动。该方法保留了双面费曼图的所有功能,用于记录激发场景,并通过允许交互描述来对其进行补充。图的规则也被导出。

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