Error per single-qubit gate below 10−4 in a superconducting qubit

  1. Zhiyuan Li,
  2. Pei Liu,
  3. Peng Zhao,
  4. Zhenyu Mi,
  5. Huikai Xu,
  6. Xuehui Liang,
  7. Tang Su,
  8. Weijie Sun,
  9. Guangming Xue,
  10. Jing-Ning Zhang,
  11. Weiyang Liu,
  12. Yirong Jin,
  13. and Haifeng Yu
Implementing arbitrary single-qubit gates with near perfect fidelity is among the most fundamental requirements in gate-based quantum information processing. In this work, we fabric

Vacuum-gap transmon qubits realized using flip-chip technology

  1. Xuegang Li,
  2. Yingshan Zhang,
  3. Chuhong Yang,
  4. Zhiyuan Li,
  5. Junhua Wang,
  6. Tang Su,
  7. Mo Chen,
  8. Yongchao Li,
  9. Chengyao Li,
  10. Zhenyu Mi,
  11. Xuehui Liang,
  12. Chenlu Wang,
  13. Zhen Yang,
  14. Yulong Feng,
  15. Kehuan Linghu,
  16. Huikai Xu,
  17. Jiaxiu Han,
  18. Weiyang Liu,
  19. Peng Zhao,
  20. Teng Ma,
  21. Ruixia Wang,
  22. Jingning Zhang,
  23. Yu Song,
  24. Pei Liu,
  25. Ziting Wang,
  26. Zhaohua Yang,
  27. Guangming Xue,
  28. Yirong Jin,
  29. and Haifeng Yu
Significant progress has been made in building large-scale superconducting quantum processors based on flip-chip technology. In this work, we use the flip-chip technology to realize

Transmon qubit with relaxation time exceeding 0.5 milliseconds

  1. Chenlu Wang,
  2. Xuegang Li,
  3. Huikai Xu,
  4. Zhiyuan Li,
  5. Junhua Wang,
  6. Zhen Yang,
  7. Zhenyu Mi,
  8. Xuehui Liang,
  9. Tang Su,
  10. Chuhong Yang,
  11. Guangyue Wang,
  12. Wenyan Wang,
  13. Yongchao Li,
  14. Mo Chen,
  15. Chengyao Li,
  16. Kehuan Linghu,
  17. Jiaxiu Han,
  18. Yingshan Zhang,
  19. Yulong Feng,
  20. Yu Song,
  21. Teng Ma,
  22. Jingning Zhang,
  23. Ruixia Wang,
  24. Peng Zhao,
  25. Weiyang Liu,
  26. Guangming Xue,
  27. Yirong Jin,
  28. and Haifeng Yu
By using the dry etching process of tantalum (Ta) film, we had obtained transmon qubit with the best lifetime (T1) 503 us, suggesting that the dry etching process can be adopted in