Improving the performance of superconducting microwave resonators in magnetic fields

被引：52

作者：

Bothner, D. ^{[1
]}

Gaber, T. ^{[1
]}

Kemmler, M. ^{[1
]}

Koelle, D. ^{[1
]}

Kleiner, R. ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys, Expt Phy & Ctr Collect Quantum Phenomena 2, D-72076 Tubingen, Germany

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 10期

基金：

欧洲研究理事会;

关键词：

D O I：

10.1063/1.3560480

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The operation of superconducting coplanar waveguide cavities, as used for circuit quantum electrodynamics and kinetic inductance detectors, in perpendicular magnetic fields normally leads to a reduction in the device performance due to energy dissipating Abrikosov vortices. We experimentally investigate the vortex induced energy losses in such Nb resonators with different spatial distributions of micropatterned pinning sites (antidots) by transmission spectroscopy measurements at 4.2 K. In comparison to resonators without antidots we find a significant reduction in vortex induced losses, and thus increased quality factors over a broad range of frequencies and applied powers in moderate fields. (C) 2011 American Institute of Physics. [doi:10.1063/1.3560480]

引用

页数：3

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