Thouless charge pumping or transport of quantum mechanical particles through a periodic modulation of the system Hamiltonian exhibiting a topological phase transition is known to be unstable in the presence of strong disorder in the system. In this paper, however, we show that in a one-dimensional Su-Schrieffer-Heeger lattice, an onsite quasiperiodic disorder favors a quantized particle transport and hence a robust Thouless charge pumping. This unusual property is found to be due to an emergence of a topological to trivial phase transition as the quasiperiodic disorder strength is increased. This transition allows us to propose a nonstandard pumping scheme where a periodic modulation of the disorder strength also favors a quantized Thouless charge pump. Our model and prediction may be simulated in state-of-the-art ultracold atomic setups.

中文翻译：

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现场准周期无序系统中的量子化电荷泵浦

尽管通过周期性调制表现出拓扑相变的系统哈密顿量来进行量子力学粒子的电荷泵浦或传输，但已知在系统中存在强无序的情况下是不稳定的。然而，在本文中，我们表明在一维 Su-Schrieffer-Heeger 晶格中，现场准周期无序有利于量子化粒子输运，从而有利于稳健的电荷泵浦。人们发现这种不寻常的性质是由于随着准周期无序强度的增加而出现了拓扑相变到平凡相变。这种转变使我们能够提出一种非标准泵浦方案，其中无序强度的周期性调制也有利于量化的 Thouless 电荷泵。我们的模型和预测可以在最先进的超冷原子装置中进行模拟。