Telegraph Flux Noise Induced Beating Ramsey Fringe in Transmon Qubits  

作　　者：Zhi-Hao Wu Ling-Xiao Lei Xin-Fang Zhang Shi-Chuan Xue Shun Hu Cong Li Xiang Fu Ping-Xing Chen Kai Lu Ming-Tang Deng Jun-Jie Wu 武志豪;雷凌霄;张鑫方;薛诗川;胡顺;李璁;付祥;陈平形;卢凯;邓明堂;吴俊杰

机构地区：[1]College of Computer Science and Technology,National University of Defense Technology,Changsha 410073,China [2]College of Science,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics Letters》2025年第4期23-37,共15页中国物理快报(英文版)

摘　　要：Ramsey oscillations typically exhibit an exponential decay envelope due to environmental noise. However,recent experiments have observed nonmonotonic Ramsey fringes characterized by beating patterns, which deviate from the standard behavior. These beating patterns have primarily been attributed to charge-noise fluctuations.In this paper, we have experimentally observed Ramsey fringe with beating pattern for transmon qubits, and traced the origin to electric instruments induced flux noise.

关 键 词：ramsey fringes electric instruments induced flux noise ramsey oscillations ramsey fringe transmon qubits beating patterns beating pattern telegraph flux noise 

分 类 号：O413[理学—理论物理]