论文标题
在可调的曲折晶格上，受对称保护的拓扑相变和强大的手性秩
Symmetry-protected topological phase transitions and robust chiral order on a tunable zigzag lattice
论文作者
论文摘要
对称分数化产生大量对称性保护的拓扑阶段，为连续相变的场景提供了不同于自发对称性破坏的场景。但是，很难通过实验检测这些对称性保护的拓扑相变。由于最近的高度可调节超低极性分子的发展，我们表明该系统的锯齿形光学晶格中的设置为实现对称性保护的拓扑相变提供了完美的平台。通过使用无限的时间不断变化的块拆卸，我们在大型参数区域获得了相图，并找到了另一个方案来实现长期追求的矢量手性相，这是从量子波动中强大的。我们通过有效的现场分析讨论了手性阶段的存在。
Symmetry fractionalization, generating a large amount of symmetry-protected topological phases, provides scenarios for continuous phase transitions different from spontaneous symmetry breaking. However, it is hard to detect these symmetry-protected topological phase transitions experimentally. Motivated by the recent development of highly tunable ultracold polar molecules, we show that the setup in a zigzag optical lattice of this system provides a perfect platform to realize symmetry-protected topological phase transitions. By using infinite time-evolving block decimation, we obtain the phase diagram in a large parameter regions and find another scheme to realize the long-sought vector chiral phase, which is robust from quantum fluctuations. We discuss the existence of the chiral phase by an effective field analysis.
