Determining Interface Dielectric Losses in Superconducting Coplanar-Waveguide Resonators
By W. Woods, G. Calusine, A. Melville, Arjan Sevi, E. Golden, David K. Kim, D. Rosenberg, J. Yoder, William D. Oliver. Physical Review Applied, 2018
139 citations recorded by the source corpus.
Superconducting quantum computing architectures comprise resonators and qubits that experience energy loss due to two-level systems (TLS) in bulk and interfacial dielectrics. Understanding these losses is critical to improving performance in superconducting circuits. In this work, we present a method for quantifying the TLS losses of different bulk and interfacial dielectrics present in superconducting coplanar waveguide (CPW) resonators. By combining statistical characterization of sets of specifically designed CPW resonators on isotropically etched silicon substrates with detailed electromagnetic modeling, we determine the separate loss contributions from individual material interfaces and bulk dielectrics. This technique for analyzing interfacial TLS losses can be used to guide targeted improvements to qubits, resonators, and their superconducting fabrication processes.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/a8da263823b31ed769811fcb8824a11197360450
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Citations in the corpus
- Materials challenges and opportunities for quantum computing hardware (2021, methodology): “…focused on systematically varying the qubit geometry to change the degreeofoverlap betweentheelectromagnetic mode and the interfaces or surfaces of the device ( 60 , 94 , 97 – 101 ) and preparing surfaces to reduce lossy oxides before growth or deposition of the superconducting metal ( 97 , 102 ).”