2023/09/25 by Lu Xianliang, Ze-Liang Xiang, Lu, Xian-Liang +1 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Quantum Physics (quant-ph) #Surface Chemistry and Catalysis #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2309.13846
openalex publication_date 2023/09/25 · openalex created_date 2023/09/27 · openalex updated_date 2026/07/28
Topological edge states are recently attracting intense interest due to their robustness in the presence of disorder and defects. However, most approaches for manipulating such states require global modulations of the system's Hamiltonian. In this work, we develop a method to control edge states using local interactions of a four-node junction between cross-one-dimensional topological atomic chains. These junction interactions can give rise to tunable couplings between the hybridized edge states within different geometric symmetry, allowing us to implement robust quantum state transfer and SWAP gate between the two topological chains, where the edge states are pair-encoded as a single qubit. Moreover, when the atoms are precisely positioned to couple waveguides, the correlated decay caused by the environment enables the anti-symmetric edge states to present subradiant dynamics and thus show extremely long coherence time. These findings open up new possibilities for quantum technologies with topological edge states in the future.