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Tiling with triangles: parquet andGWγmethods unified
Physical Review Research Pub Date : 2021-02-15 , DOI: 10.1103/physrevresearch.3.013149
Friedrich Krien , Anna Kauch , Karsten Held

The parquet formalism and Hedin's GWγ approach are unified into a single theory of vertex corrections, corresponding to an exact reformulation of the parquet equations in terms of boson exchange. The method has no drawbacks compared to previous parquet solvers but has the significant advantage that the vertex functions decay quickly with frequencies and with respect to distances in real space. These properties coincide with the respective separation of the length and energy scales of the two-particle correlations into long/short-ranged and high/low-energetic.

中文翻译:

三角形平铺:实木复合地板和GWγ方法统一

实木复合地板形式主义与海丁的 Gw ^γ该方法被统一到一个单一的顶点校正理论中,对应于玻色子交换方面的拼花方程组的精确重构。与先前的镶木地板求解器相比,该方法没有缺点,但是具有显着的优点,即顶点函数随频率和相对于真实空间中的距离的衰减而迅速衰减。这些性质与将两个粒子相关性的长度和能量尺度分别分离为长/短程和高/低能量有关。
更新日期:2021-02-15
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