期刊
APPLIED PHYSICS LETTERS
卷 107, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4934486
关键词
-
资金
- NSF [DGE-1122492]
- IARPA [W911NF-09-1-0369]
- ARO [W911NF-09-1-0514]
We study the energy relaxation times (T-1) of superconducting transmon qubits in 3D cavities as a function of dielectric participation ratios of material surfaces. This surface participation ratio, representing the fraction of electric field energy stored in a dissipative surface layer, is computed by a two-step finite-element simulation and experimentally varied by qubit geometry. With a clean electromagnetic environment and suppressed non-equilibrium quasiparticle density, we find an approximately proportional relation between the transmon relaxation rates and surface participation ratios. These results suggest dielectric dissipation arising from material interfaces is the major limiting factor for the T-1 of transmons in 3D circuit quantum electrodynamics architecture. Our analysis also supports the notion of spatial discreteness of surface dielectric dissipation. (C) 2015 AIP Publishing LLC.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据