Hierarchical bound states in heat transport
Higher-order topological phases in non-Hermitian photonics revolutionize the understanding of wave propagation and modulation, which lead to hierarchical states in open systems. However, intrinsic insulating properties endorsed by the lattice symmetry of photonic crystals fundamentally confine the robust transport only at explicit system boundaries, letting alone the flexible reconfiguration in hierarchical states at arbitrary positions. Here, we report a dynamic topological platform for creating the reconfigurable hierarchical bound states in heat transport systems and observe the robust and nonlocalized higher-order states in both the real- and imaginary-valued bands. Our experiments showcase that the hierarchical features of zero-dimension corner and nontrivial edge modes occur at tailored positions within the system bulk states instead of the explicit system boundaries. Our findings uncover the mechanism of non-localized hierarchical non-trivial topological states and offer distinct paradigms for diffusive transport field management.
Authors
- Cheng-Long Zhou (ORCID: https://orcid.org/0000-0003-1526-9152)
- Shuihua Yang (ORCID: https://orcid.org/0000-0002-0396-9832)
- Haiyan Fan (ORCID: https://orcid.org/0000-0002-3110-4190)
- Xue Zhou (ORCID: https://orcid.org/0000-0002-3478-3299)
- Guoqiang Xu (ORCID: https://orcid.org/0000-0002-8729-0287)
- Cheng‐Wei Qiu (ORCID: https://orcid.org/0000-0002-6605-500X)
- Xianghong Kong (ORCID: https://orcid.org/0000-0002-9881-2116)
- Jianfeng Chen (ORCID: https://orcid.org/0000-0002-9088-2750)
- Jiaxin Li (ORCID: https://orcid.org/0000-0003-2373-8158)
Institutions
- Hong Kong Polytechnic University (HK)
- Chongqing Technology and Business University (CN)
- National University of Singapore (SG)
- Harbin Institute of Technology (CN)
- Suzhou Research Institute (CN)
Publication Details
- Journal
- Proceedings of the National Academy of Sciences
- Published
- 2024-09-10
- DOI
- https://doi.org/10.1073/pnas.2412031121
- Citations
- 7
- Primary Topic
- Quantum Mechanics and Non-Hermitian Physics
- Type
- article
- Field-Weighted Citation Impact
- 2.36
Funders
- Chongqing Municipal Education Commission Foundation
- National Research Foundation
- National University of Singapore
- National Research Foundation Singapore
- Ministry of Education - Singapore
- National Natural Science Foundation of China
- Government of Jiangsu Province
- Chongqing Municipal Education Commission
- Science and Technology Support Program of Jiangsu Province