Title: Structural disorder induced topological phase transition in Rydberg atoms

speaker: Yong Xu, Institute for Interdisciplinary Information Sciences, Tsinghua University

Time: 2:00 pm, Mar.14th，2024

Venue: C302, New Science Building

Abstract: In this talk, I will first briefly show our finding that structural disorder can drive a phase transition from a topologically trivial phase to a second-order topological phase. However, to experimentally observe such a topological phase transition is very challenging due to the difficulty in controlling structural disorder in a quantum material. Given experimental realization of randomly positioned Rydberg atoms, such a system is naturally suited to studying structural disorder induced topological phase transitions and topological amorphous phases. I will then discuss in detail how to realize the structural disorder induced topological phase transition with Rydberg atoms.

References

1. Kai Li, Jiong-Hao Wang, Yan-Bin Yang, and Yong Xu, Symmetry-Protected Topological Phases in a Rydberg Glass, Phys. Rev. Lett. 127, 263004 (2021).

2. J.-H. Wang, Y.-B. Yang, N. Dai, and Y. Xu, Structural Disorder Induced Second-order Topological Insulators in Three Dimensions, Phys. Rev. Lett. 126, 206404 (2021).

3. Y.-B. Yang, J.-H. Wang, K. Li, and Y. Xu, Higher-order topological phases in crystalline and non-crystalline systems: a review, arXiv:2309.03688.