论文标题
水稻链中的能量极化和能量泵送
Energy polarization and energy pumping in Rice-Mele chains
论文作者
论文摘要
由两个位点单位电池组成的一维水稻晶格可以在低温下泵送拓扑电荷。我们在这里显示，在该系统中，能量泵送是可行的。我们使用第二定量化形式主义分析能量极化，并通过相关的连续性方程将其连接到Intercell Enercy电流。按照此制定，当系统参数随时间变化而变化时，我们会在数值上评估绝热循环中泵送的能电流。与泵送电荷不同，泵送的能量在半填充时完全独立于温度。泵送周期期间所有频段的全局浆果阶段以及相关的拓扑相变的含量是能量泵送的。本研究为无电和热偏见操纵能电流铺平了道路。
The one-dimensional Rice-Mele lattice consisting of two-site unit cells enables topological charge pumping at low enough temperatures. We show here that energy pumping is feasible in this system. We analyze energy polarization using the second-quantization formalism and connect it to intercell energy current by the relevant continuity equation. Following this formulation, we numerically evaluate the energy current pumped in an adiabatic cycle when the system parameters vary periodically and slowly with time. Unlike the pumped charge, the pumped energy is entirely temperature-independent at half filling. The global Berry phase for all bands and the related topological phase transitions during the pumping cycle account for the energy pumping. The present study paves the way for manipulating energy current without electric and thermal biases.
