@inproceedings{a720dc9684f24eb68f8aecf29f0d3b85,
title = "Reducing surface loss in 3D microwave copper cavities for superconducting transmon qubits",
abstract = "The recent implementation of three-dimensional microwave cavities coupled to superconducting transmon qubits has led to dramatic improvements in qubit coherence times [1]. Besides the superconducting aluminum cavities that have been used in many such measurements, other recent experiments have utilized copper cavities [2] with coherence times now approaching 0.1 ms. We are investigating the effects on the quality factor for three-dimensional copper cavities that have the cavity-wall surfaces electropolished and coated with a superconducting tin layer. The copper base provides a good path for thermalizing the cavity walls and qubit chip, while the surface treatment reduces the microwave loss. We have measured a superconducting transmon qubit in such a cavity and we report our low-temperature coherence results on the same qubit and cavity measured in two different labs.",
keywords = "3D cavity resonators, cQED, cavity quality factor, superconducting qubits, transmon",
author = "Bogorin, {Daniela F.} and Matthew Ware and McClure, {D. T.} and Stephen Sorokanich and Plourde, {B. L.T.}",
year = "2013",
doi = "10.1109/ISEC.2013.6604283",
language = "English (US)",
isbn = "9781467363716",
series = "2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013",
booktitle = "2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013",
note = "2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013 ; Conference date: 07-07-2013 Through 11-07-2013",
}