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Non-Abelian fractional Chern insulator on a hyperbolic lattice

Ai-Lei He1,2, Lu Qi1,2, Wei-Wei Luo3,4,5,*, and Yongjun Liu1,†

  • 1College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
  • 2Institute of Quantum Science and Technology, Yanbian University, Yanji, Jilin 133002, China
  • 3Zhejiang Institute of Photoelectronics & Zhejiang Institute for Advanced Light Source, Zhejiang Normal University, Jinhua 321004, China
  • 4Center for Statistical and Theoretical Condensed Matter Physics, and Department of Physics, Zhejiang Normal University, Jinhua 321004, China
  • 5National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

  • *Contact author: luoweiwei@zjnu.edu.cn
  • †Contact author: yjliu@yzu.edu.cn

Phys. Rev. B 112, 245140 – Published 16 December, 2025

DOI: https://doi.org/10.1103/rr6b-8536

Abstract

Abelian fractional Chern insulators have been previously investigated in hyperbolic kagome lattices with constant negative curvature, in which the geometric degree of freedom has been revealed. In this work, we study the ν=1 non-Abelian fractional Chern insulator (FCI) with three-body hard-core bosons loaded into a topological flat band (TFB) model constructed in the hyperbolic analog of kagome lattice. Convincing numerical evidence is found for this non-Abelian FCI state, which is the Moore-Read-like ground state with clear edge excitation spectra. We also construct the trial wave function for this non-Abelian FCI based on the generalized Pauli principle, the Jack polynomials for the Moore-Read state, and single-particle states of the hyperbolic TFB model. A high value of overlap between the trial wave function and the exact diagonalization results demonstrates the existence of a hyperbolic non-Abelian FCI state. The inherent geometry of the hyperbolic non-Abelian FCI state is revealed as well.

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