We report a technique that can noninvasively add multiple DC wires into a 3D superconducting microwave cavity for electronic devices that require DC electrical terminals. We studied the influence of our DC lines on the cavity performance systematically. We found that the quality factor of the cavity is reduced if any of the components of the electrical wires cross the cavity equipotential planes. Using this technique, we were able to incorporate a quantum dot (QD) device into a 3D cavity. We then controlled and measured the QD transport signal using the DC lines. We have also studied the heating effects of the QD by the microwave photons in the cavity.
@article{arxiv.1412.8015,
title = {Introduction of DC line structures into a superconducting microwave 3D cavity},
author = {Wei-Cheng Kong and Guang-Wei Deng and Shu-Xiao Li and Hai-Ou Li and Gang Cao and Ming Xiao and Guo-Ping Guo},
journal= {arXiv preprint arXiv:1412.8015},
year = {2015}
}