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Topological Quantum Computing

Topological Floquet Flat Bands in Irradiated Alternating Twist Multilayer Graphene

arXiv
Authors: Yingyi Huang

Year

2023

Paper ID

54632

Status

Preprint

Abstract Read

~2 min

Abstract Words

109

Citations

N/A

Abstract

We study the appearance of topological Floquet flat bands in alternating-twist multilayer graphene, which has alternating relative twist angle pmθ near the first magic angle. While the system hosts both flat bands and a steep Dirac cone in the static case, the circularly polarized laser beam can open a gap at the Moiré K point and create Floquet flat bands carrying nonzero Chern numbers. Considering recent lattice-relaxation results, we find that the topological flat band is well-isolated for the effective interlayer tunneling in n=3, 4, 5 layers. Such dynamically produced topological flat bands are potentially observed in the experiment and thus provide a feasible way to realize the fractional Chern insulator.

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  • This paper contributes to the Topological Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2023 reference point for readers tracking recent quantum research.
  • We study the appearance of topological Floquet flat bands in alternating-twist multilayer graphene, which has alternating relative twist angle pmθ near the first magic angle.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2309.11685 [2] arXiv https://arxiv.org/abs/2309.11685 [3] Publisher https://arxiv.org/abs/2309.11685

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