2008/07/25 by M. Göppl, A. Fragner, M. Baur +7 · 356 citations
Computer Science · Physics and Astronomy · #Circuit quantum electrodynamics #Coplanar waveguide #Coupling (piping) #Electromagnetic field #Mechanical and Optical Resonators #Microwave #Photon #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Resonance (particle physics) #Resonator #cond-mat.supr-con
paper · pdf · doi:10.1063/1.3010859
published in Journal of Applied Physics 104(11) (American Institute of Physics) · 8 pages, 8 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html
arxiv created 2008/07/25 · openalex publication_date 2008/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
High quality on-chip microwave resonators have recently found prominent new applications in quantum optics and quantum information processing experiments with superconducting electronic circuits, a field now known as circuit quantum electrodynamics (QED). They are also used as single photon detectors and parametric amplifiers. Here we analyze the physical properties of coplanar waveguide resonators and their relation to the materials properties for use in circuit QED. We have designed and fabricated resonators with fundamental frequencies from 2 to 9 GHz and quality factors ranging from a few hundreds to a several hundred thousands controlled by appropriately designed input and output coupling capacitors. The microwave transmission spectra measured at temperatures of 20 mK are shown to be in good agreement with theoretical lumped element and distributed element transmission matrix models. In particular, the experimentally determined resonance frequencies, quality factors, and insertion losses are fully and consistently explained by the two models for all measured devices. The high level of control and flexibility in design renders these resonators ideal for storing and manipulating quantum electromagnetic fields in integrated superconducting electronic circuits.