학술논문
Fluctuations of Energy-Relaxation Times in Superconducting Qubits
Document Type
Working Paper
Author
Klimov, P. V.; Kelly, J.; Chen, Z.; Neeley, M.; Megrant, A.; Burkett, B.; Barends, R.; Arya, K.; Chiaro, B.; Chen, Yu; Dunsworth, A.; Fowler, A.; Foxen, B.; Gidney, C.; Giustina, M.; Graff, R.; Huang, T.; Jeffrey, E.; Lucero, Erik; Mutus, J. Y.; Naaman, O.; Neill, C.; Quintana, C.; Roushan, P.; Sank, Daniel; Vainsencher, A.; Wenner, J.; White, T. C.; Boixo, S.; Babbush, R.; Smelyanskiy, V. N.; Neven, H.; Martinis, John M.
Source
Phys. Rev. Lett. 121, 090502 (2018)
Subject
Language
Abstract
Superconducting qubits are an attractive platform for quantum computing since they have demonstrated high-fidelity quantum gates and extensibility to modest system sizes. Nonetheless, an outstanding challenge is stabilizing their energy-relaxation times, which can fluctuate unpredictably in frequency and time. Here, we use qubits as spectral and temporal probes of individual two-level-system defects to provide direct evidence that they are responsible for the largest fluctuations. This research lays the foundation for stabilizing qubit performance through calibration, design, and fabrication.
Comment: 7 main pages, 3 main figures, 5 supplemental pages, 5 supplemental figures
Comment: 7 main pages, 3 main figures, 5 supplemental pages, 5 supplemental figures