基于超导约瑟夫森结的量子比特系统实验研究
Research on Experimental System of Superconducting Qubits Based on Josephson Junctions
栾添 1高岩松 2匡学衡 2孙晓培 2陆军1
作者信息
- 1. 量子科技长三角产业创新中心,苏州 215000;中国电子科学研究院,北京 100041
- 2. 量子科技长三角产业创新中心,苏州 215000
- 折叠
摘要
使用频率可调的传输子结构量子比特,设计了一种单链形式的20 bit量子芯片,利用定制化的低温环境控制系统和低温同轴线缆组件,完成了所有量子比特的基本表征实验,超导量子比特的能量退相干时间最高可达31.3 μs,相位退相干时间最高可达22.8 μs,随机基准测试单比特门的平均保真度可达 99.85%,量子过程层析测量得到的两比特受控Z门保真度为97.5%.基于单比特门和两比特门的编织量子线路演示了量子动力学模拟算法,观察到伊辛模型的动力学演化过程.
Abstract
A single-chain twenty-qubit quantum chip was designed by using frequency adjustable transmon structure.We performed basic characterization experiments on all qubits using a customized low-temperature environment control system and low-temperature coaxial cable components,which have attained a maximum energy decoherence time T1 of 31.3 μs and a phase decoherence time T*2 of 22.8 μs among all qubits.An average fidelity of 99.85%for single-qubit gates was gained as determined by random benchmark testing.The two-qubit Controlled-Z gate calibration was also achieved,with a fidelity of 97.5%measured through quantum process tomography.Finally,we demonstrated a quantum dynamics simulation algorithm based on the operation of single-qubits gates and double-qubits gates,successfully observing the dynamical evolution of the Ising model.
关键词
量子计算/超导量子比特/量子算法Key words
quantum computing/superconducting qubit/quantum algorithm引用本文复制引用
出版年
2024
NETL
NSTL
万方数据