High quality three-dimensional aluminum microwave cavities
Artikel i vetenskaplig tidskrift, 2020

We present a comprehensive study of internal quality factors in superconducting stub-geometry three-dimensional cavities made of aluminum. We use wet etching, annealing, and electrochemical polishing to improve the as machined quality factor. We find that the dominant loss channel is split between the two-level system loss and an unknown source with a 40:60 proportion. A total of 17 cavities of different purity, resonance frequency, and size were studied. Our treatment results in reproducible cavities, with 10 of them showing internal quality factors above 80 x 10(6) at a power corresponding to an average of a single photon in the cavity. The best cavity has an internal quality factor of 115 x 10(6) at a single photon level. (C) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/).

Författare

Marina Kudra

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Janka Biznárová

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Anita Fadavi Roudsari

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

J. J. Burnett

National Physical Laboratory (NPL)

David Niepce

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Simone Gasparinetti

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Björn Wickman

Chalmers, Fysik, Kemisk fysik

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 117 7 070601

Ämneskategorier

Acceleratorfysik och instrumentering

Telekommunikation

Övrig annan samhällsvetenskap

DOI

10.1063/5.0016463

Mer information

Senast uppdaterat

2020-10-12