论文标题

带有三角形的瓷砖:镶木木和$gwγ$方法统一

Tiling with triangles: parquet and $GWγ$ methods unified

论文作者

Krien, Friedrich, Kauch, Anna, Held, Karsten

论文摘要

镶木素形式主义和Hedin的$GWγ$方法被统一为一个顶点校正理论,与Boson Exchange的镶木quet方程的精确重新制定相对应。与以前的镶木求解器相比,该方法没有缺点,但是在实际空间中的频率和距离方面,顶点函数迅速衰减。这些特性与两粒子相关的长度和能量尺度的分离相吻合,分为长/短距和高/低源。

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.

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