Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.263004
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Funding
- National Natural Science Foundation of China [11974201]
- Tsinghua University
- National ThousandYoung-Talents Program
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Recent theoretical studies suggest that structural disorder can induce a topological insulator from a crystalline material, but experimental observation is challenging. With the experimentally realized randomly positioned Rydberg atoms, studying structural disorder induced topological phase transitions becomes feasible. The research reveals symmetry-protected topological amorphous insulators and structural disorder induced topological phase transition at a single-particle level in an experimentally accessible system.
Recent theoretical studies predict that structural disorder, serving as a bridge connecting a crystalline material to an amorphous material, can induce a topological insulator from a trivial 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. Motivated by the development, we study topological phases in an experimentally accessible one-dimensional amorphous Rydberg atom chain with random atom configurations. In the single-particle level, we find symmetry-protected topological amorphous insulators and a structural disorder induced topological phase transition, indicating that Rydberg atoms provide an ideal platform to experimentally observe the phenomenon using state-of-the-art technologies. Furthermore, we predict the existence of a gapless symmetry-protected topological phase of interacting bosons in the experimentally accessible system. The resultant many-body topological amorphous phase is characterized by a Z2 invariant.
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