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arXiv 1301.7435cond-mat.quant-gas
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一维光晶格中的拓扑电荷泵

Topological charge pumping in a one-dimensional optical lattice

Lei Wang, Matthias Troyer, Xi Dai

摘要:

拓扑电荷泵[1]以量子化的方式传输电荷。量子化对泵浦协议和外部噪声的详细形式是稳定的,并且与量子霍尔效应共享相同的拓扑起源。提出了一种实现一维光晶格中冷原子拓扑电荷抽运的实验装置。泵浦电荷的量子化证实了第一性原理模拟的动力学均匀和陷阱系统。量子效应被证明是至关重要的电荷量子化的拓扑保护。讨论了绝热效应和非绝热效应对实验观测值的影响。实现这样的拓扑电荷泵服务器作为一个坚实的一步,探索拓扑状态和非平衡动力学利用冷原子。

英文摘要:

A topological charge pump [1] transfers charge in a quantized fashion. The quantization is stable against the detailed form of the pumping protocols and external noises and shares the same topological origin as the quantum Hall effect. We propose an experiment setup to realize topological charge pumping of cold atoms in a one-dimensional optical lattice. The quantization of the pumped charge is confirmed by first-principle simulations of the dynamics of uniform and trapped systems. Quantum effects are shown to be crucial for the topological protection of the charge quantization. Finite-temperature and non-adiabatic effect on the experimental observables are discussed. Realization of such a topological charge pump servers as a firm step towards exploring topological states and non-equilibrium dynamics using cold atoms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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