Interplay between topology and localization on superconducting circuits  

作　　者：关欣 霍炳燕 陈刚 Xin Guan;Bingyan Huo;Gang Chen(Department of Materials and Chemical Engineering,Taiyuan University,Taiyuan 030032,China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;School of Physics,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]Department of Materials and Chemical Engineering,Taiyuan University,Taiyuan 030032,China [2]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [4]School of Physics,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Physics B》2024年第6期240-246,共7页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Shanxi Province,China (Grant No. 202103021223010)。

摘　　要：Topological insulators occupy a prominent position in the realm of condensed matter physics. Nevertheless, the presence of strong disorder has the potential to disrupt the integrity of topological states, leading to the localization of all states.This study delves into the intricate interplay between topology and localization within the one-dimensional Su–Schrieffer–Heeger(SSH) model, which incorporates controllable off-diagonal quasi-periodic modulations on superconducting circuits.Through the application of external alternating current(ac) magnetic fluxes, each transmon undergoes controlled driving,enabling independent tuning of all coupling strengths. Within a framework of this model, we construct comprehensive phase diagrams delineating regions characterized by extended topologically nontrivial states, critical localization, and coexisting topological and critical localization phases. The paper also addresses the dynamics of qubit excitations, elucidating distinct quantum state transfers resulting from the intricate interplay between topology and localization. Additionally, we propose a method for detecting diverse quantum phases utilizing existing experimental setups.

关 键 词：TOPOLOGY LOCALIZATION superconducting circuits 

分 类 号：O469[理学—凝聚态物理]