【科技日报】高阶非平衡拓扑相首次在量子体系中实现

Core Insights - The research team from the University of Science and Technology of China, in collaboration with Shanxi University, has achieved a significant breakthrough by realizing and detecting higher-order non-equilibrium topological phases using the programmable superconducting quantum processor "Zuchongzhi 2" [1][2] - This achievement marks an important step in quantum simulation, particularly in exploring complex topological states, and lays the groundwork for achieving quantum advantage in quantum simulation problems [1] Group 1 - The research successfully implemented quantum simulation and detection of both balanced and non-equilibrium second-order topological phases for the first time [2] - The team proposed theoretical designs for static and Floquet quantum circuits to address the challenges of constructing higher-order topological Hamiltonians in a two-dimensional superconducting qubit array [2] - A systematic optimization scheme for the processor was established, allowing for dynamic control of qubit frequency and coupling strength, leading to the successful execution of up to 50 Floquet periods of evolution operations on a 6x6 qubit array [2] Group 2 - The experiment successfully realized four different types of non-equilibrium second-order topological phases and systematically explored their energy spectrum, dynamical behavior, and topological invariants [2] - The realization of higher-order topological phases in quantum systems presents a significant scientific challenge and offers potential pathways for topological quantum computing based on non-Abelian statistics [1]