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Ten Milliseconds for Aluminum Cavities in the Quantum Regime

zqyin 添加于 2013-2-20 15:18 | 1434 次阅读 | 0 个评论

作者
Reagor M, Paik H, Catelani G, Sun L, Axline C, Holland E, Pop IM, Masluk NA, Brecht T, Frunzio L, Devoret MH, Glazman LI, Schoelkopf RJ
摘要
A promising quantum computing architecture couples superconducting qubits to microwave resonators (circuit QED), a system in which three-dimensional microwave cavities have become a valuable resource. Such cavities have surface-to-volume ratios, or participation ratios a thousandfold smaller than in planar devices, deemphasizing potentially lossy surface elements by an equal amount. Motivated by this principle, we have tested aluminum superconducting cavity resonators with internal quality factors greater than 0.5 billion and intrinsic lifetimes reaching 0.01 seconds at single photon power and millikelvin temperatures. These results are the first to explore the use of superconducting aluminum, a ubiquitous material in circuit QED, as the basis of highly coherent (Q~10^7-10^9) cavity resonators. Measurements confirm the cavities\' predicted insensitivity to quasiparticles (kinetic inductance fraction-5ppm) and an absence of two level dielectric fluctuations.
详细资料
- 关键词: cond-mat.supr-con; quant-ph
- 文献种类:手稿
- 期卷页: 2013年
- 日期: 2013-2-19
- 发布方式: arXiv e-prints
- 备注:arXiv:1302.4408v1; 4 pages, 2 figures
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