冷原子拓扑相位的探测
Detecting Topological Phases in Cold Atoms
摘要：
陈氏绝缘体是带状绝缘体，其在本体中呈现出带隙，在边缘中呈现出无带隙激发。由于霍尔输运测量对中性原子来说在技术上是不现实的，因此在冷原子中检测陈氏绝缘体是一个严峻的挑战。通过建立时间反演不变拓扑绝缘体与量子反常Hall系统之间的自然对应关系，证明了对于一类Chern绝缘体，只需测量布里渊区（BZ）高度对称点处的Bloch本征态，就可以确定其拓扑结构.此外，我们介绍了两个实验方案，包括自旋分辨布洛赫振荡进行测量。这些方案在实际的实验条件下是高度可行的。我们的结果可能为探测冷原子中的拓扑相位提供一个强有力的工具。
英文摘要：
Chern insulators are band insulators which exhibit a gap in the bulk and gapless excitations in the edge. Detection of Chern insulators is a serious challenge in cold atoms since the Hall transport measurements are technically unrealistic for neutral atoms. By establishing a natural correspondence between the time-reversal invariant topological insulator and quantum anomalous Hall system, we show for a class of Chern insulators that the topology can be determined by only measuring Bloch eigenstates at highly symmetric points of the Brillouin zone (BZ). Furthermore, we introduce two experimental schemes including the spin-resolved Bloch oscillation to carry out the measurement. These schemes are highly feasible under realistic experimental conditions. Our results may provide a powerful tool to detect topological phases in 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。
