新科学想法 › 学术文库 › 学术文献 › 浏览文献

Observation of High Coherence in Josephson Junction Qubits Measured in a Three-Dimensional Circuit QED Architecture

zqyin 添加于 2011-12-6 12:48 | 1837 次阅读 | 0 个评论

作者
Paik H, Schuster D, Bishop L, Kirchmair G, Catelani G, Sears A, Johnson B, Reagor M, Frunzio L, Glazman L, Girvin S, Devoret M, Schoelkopf R
摘要
Superconducting quantum circuits based on Josephson junctions have made rapid progress in demonstrating quantum behavior and scalability. However, the future prospects ultimately depend upon the intrinsic coherence of Josephson junctions, and whether superconducting qubits can be adequately isolated from their environment. We introduce a new architecture for superconducting quantum circuits employing a three-dimensional resonator that suppresses qubit decoherence while maintaining sufficient coupling to the control signal. With the new architecture, we demonstrate that Josephson junction qubits are highly coherent, with T₂∼10 to 20 μs without the use of spin echo, and highly stable, showing no evidence for 1/f critical current noise. These results suggest that the overall quality of Josephson junctions in these qubits will allow error rates of a few 10^-4, approaching the error correction threshold.
详细资料
- 文献种类: Journal Article
- 期刊名称: Physical Review Letters
- 期刊缩写: Phys. Rev. Lett.
- 期卷页: 2011年第107卷第24期
- ISBN: 0031-9007
学科领域自然科学 » 物理学
标签

circuit QED
相关链接 DOI URL
zqyin 的文献笔记订阅