Improving coherence and stability of superconducting qubits by thermal annealing in vacuum
Abstract
Superconducting qubits are prone to noise induced by material defects, which degrades their coherence and performance of gate operations. In this work, by thermally annealing a chip with 20 tunable transmon qubits in vacuum, we realize an approximate 30% enhancement in the average energy relaxation time T¯1 from 162 to 210 μs. After annealing, T¯1 also shows smaller fluctuations in time, and the aging of the qubits, when kept under ambient conditions, is remarkably decelerated. Our work demonstrates a simple yet highly effective way to improve the coherence and stability of superconducting qubits for scalable superconducting quantum processors.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (11)
Juan Song
Haisheng Yan
Yu Song
Department of Chemistry, College of Science
Xuehui Liang
Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences 1 , Beijing 100193,
Weijie Sun
Mo Chen
Obstetrics and Gynecology Hospital of Fudan University Shanghai China
Zhenyu Mi
Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences 1 , Beijing 100193,
Guangming Xue
Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences 1 , Beijing 100193,
Cheng Chen
Yanjun Ma
Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences 1 , Beijing 100193,
Haifeng Yu