包含量子涨落的宏观极化近似公式
Approximate formula for the macroscopic polarization including quantum fluctuations
摘要：
宏观极化的多体Berry相位公式近似为自然轨道几何相位的总和，分数占据数占主导地位的相关效应。这个简化公式精确地再现了Rice-Mele-哈伯德模型中带绝缘体-莫特绝缘体跃迁的精确极化。基于单体约化Berry曲率的类似公式准确地预测了无中心拓扑电荷泵的相互作用诱导猝灭。
英文摘要：
The many-body Berry phase formula for the macroscopic polarization is approximated by a sum of natural orbital geometric phases with fractional occupation numbers accounting for the dominant correlation effects. This reduced formula accurately reproduces the exact polarization in the Rice-Mele-Hubbard model across the band insulator-Mott insulator transition. A similar formula based on a one-body reduced Berry curvature accurately predicts the interaction-induced quenching of Thouless topological charge pumping.
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