Twist-Induced Quantum Geometry Reconfiguration in Moiré Flat Bands
Yi-Chun Hung, Xiaoting Zhou, and Arun Bansil. Twist-Induced Quantum Geometry Reconfiguration in Moiré Flat Bands arXiv:2603.20849.
CV
You can download the PDF version here.
Research Summary
Theoretical condensed matter physicist focusing on band topology, quantum geometry, and flat-band physics. My work combines analytical methods and numerical simulations to explore the properties of moiré and low-dimensional materials. Passionate about advancing our understanding of physics in complex quantum systems and contributing to the theoretical foundations of next-generation quantum technologies.
Education
- Ph.D. in Physics, Northeastern University, 2022 - present
- B.S. in Physics, National Taiwan University, 2017 - 2021
Research Experience
- Graduate Research Assistant • Northeastern University • Ph.D. with Prof. Arun Bansil
May 2023 - present • Boston, MA, USA
Moiré and flat band physics in bipartite lattices ( tight-binding & continuum modeling, quantum geometry, and GL theory )
Helical Luttinger liquid in double quantum spin Hall insulators ( bosonization and perturbative RG techniques )
Band topology in projected spectrum ( topological phases and analytical treatment of bulk-boundary correspondence )
- Student Researcher • Institute of Physics, Academia Sinica • Appointed by Dr. Hsin Lin
Sep. 2020 – Jun. 2022 (Research Assistant: Jul. - Sep. 2021) • Taipei, Taiwan
- Phenomenological superconducting proximity effect modeling ( tight-binding modeling on materials & lattice models )
Core Publications (*: co-first authorship)
Quantum Geometry of Moiré Flat Bands Beyond the Valley Paradigm
Xiaoting Zhou*, Yi-Chun Hung*, and Arun Bansil. Quantum Geometry of Moiré Flat Bands Beyond the Valley Paradigm arXiv:2603.20852.
Extending Topological Bound on Quantum Weight Beyond Symmetry-Protected Topological Phases
Yi-Chun Hung*, Yugo Onishi*, Hsin Lin, Liang Fu, and Arun Bansil. Extending Topological bound on Quantum Weight Beyond Symmetry-Protected Topological Phase. arXiv:2603.13041.
Nested Feature Spectrum Topology: Tripartite Topological Equivalence of Feature, Entanglement, and Wilson Loop Spectrum
Yi-Chun Hung*, Tzen ong*, and Hsin Lin. Nested Feature Spectrum Topology: Tripartite Topological Equivalence of Feature, Entanglement, and Wilson Loop Spectrum arXiv:2603.13128.
Tunable Competing Electronic Orders in Double Quantum Spin Hall Superlattices
Yi-Chun Hung, Chen-Hsuan Hsu, and Arun Bansil. Tunable Competing Electronic Orders in Double Quantum Spin Hall Superlattices. Phys. Rev. B 112, 195127 (2025).
Geometry-driven moiré in twisted bilayers of high pseudospin fermions
Yi-Chun Hung*, Xiaoting Zhou*, and Arun Bansil. Geometry-driven moiré in twisted bilayers of high pseudospin fermions. Phys. Rev. B 112, L041403 (2025)
Majorana Kramers pairs in synthetic high spin Chern insulators
Yi-Chun Hung, Chen-Hsuan Hsu, and Arun Bansil. Majorana Kramers pairs in synthetic high-spin Chern insulators. Phys. Rev. B 111, 245145 (2025).
Topological characteristics and bulk-boundary correspondence in the orbital Hall effect
Baokai Wang*, Yi-Chun Hung*, Hsin Lin, Sheng Li, Rui-Hua He, and Arun Bansil. Topological characteristics and bulk-boundary correspondence in the orbital Hall effect. Phys. Rev. B 111, 195102 (2025).
Generation of isolated flat bands with tunable numbers through moiré engineering
Xiaoting Zhou*, Yi-Chun Hung*, Baokai Wang*, and Arun Bansil. Generation of isolated flat bands with tunable numbers through moiré engineering. Phys. Rev. Lett. 133, 236401 (2024).
Time-reversal soliton pairs in even spin Chern number higher-order topological insulators
Yi-Chun Hung, Baokai Wang, Chen-Hsuan Hsu, Arun Bansil, and Hsin Lin. Time-reversal soliton pairs in even spin Chern number higher-order topological insulators. Phys. Rev. B 110, 035125 (2024).
Higher-order topological phases hidden in quantum spin Hall insulators
Baokai Wang, Yi-Chun Hung, Xiaoting Zhou, Arun Bansil, and Hsin Lin. Higher-order topological phases hidden in quantum spin Hall insulators. Phys. Rev. B 108, 245103 (2023).
Feature Spectrum Topology
Baokai Wang*, Yi-Chun Hung*, Xiaoting Zhou, Tzen Ong, and Hsin Lin. Feature Spectrm Topology. arXiv:2310.14832.
Numerical Skills
- Familiar with computing on HPC clusters
- First-principles calculation using VASP
- Proficient in coding with Matlab
- Coding with Python 3 and Mathematica
Honors and Awards
- Graduate Academic Excellence First-Year 2022-2023, Northeastern University, Boston, MA, USA
- Excellence in Teaching First-Year 2022-2023, Northeastern University, Boston, MA, USA
- Academia Sinica Scholarship, Institute of Physics, Academia Sinica, Taipei, Taiwan, Sep. 2021 - Jun. 2022 and Sep. 2020 - Jun. 2021
- College Student Research Scholarship, Ministry of Science and Technology, Taiwan, Jan. 2020 - Jun. 2020
Teaching Experience
Talks
Quantum Geometry of Moiré Flat Bands Beyond the Valley Paradigm
Contributing Talk at APS March Meeting, Denver, CO
Twist-Induced Quantum Geometry Reconfiguration in Moiré Flat Bands
Contributing Talk at APS March Meeting, Denver, CO
More is different at the edge: helical Luttinger liquid in double quantum spin Hall insulators
Invited Talk (online) at Institute of Physics, Academia Sinica, Taipei, Taiwan
Quantum Geometry Driven Fluctuation Phenomena in Flat-Band Systems
Contributing Talk at The New England Section of the American Physical Society, Providence, RI
Generation of Isolated Flat Bands with Tunable Numbers through Moiré Engineering
Poster Presentation at The New England Section of the American Physical Society, Providence, RI
Quantum Materials and Topology: Toward Robust Platforms for Quantum Computation
Invited Talk (online) at Annual Meeting of NSF-ExpandQISE 2: Exotic Physics and Applications of Solid-State Qubits, Arlington, VA
Emergent Majorana Kramers pairs in interacting spin/mirror Chern insulators
Contributing Talk at APS March Meeting, Anaheim, CA
Moiré Engineering for Tunable Numbers of Flat Bands and Its Quantum Geometry
Invited Talk at Department of Physics, National Cheng Kung University, Tainan, Taiwan
Moiré Engineering for Tunable Numbers of Flat Bands and Its Quantum Geometry
Invited Talk at Institute of Physics, Academia Sinica, Taipei, Taiwan
Novel Moiré Pattern of a New Two-Dimensional Lattice
Contributing Talk at APS March Meeting, Minneapolis, MN
Time-Reversal Soliton Pair in Two-Dimensional Topological Insulating Systems
Contributing Talk at APS March Meeting, Las Vegas, NV
Edge Mass-Kink and Fractional Corner Charge in Higher-Order Topological Insulators
Invited Talk at 1-day workshop on Wannier-functions based Hamiltonians 2022, National Center for Theoretical Sciences, Physics Division, Taipei, Taiwan