Enhancing the Q-Factor of a Practical Qubit Niobium Three-Dimensional /4-Resonator Through Surface Treatment

Sergey Kutsaev,Ronald Agustsson, A. C. Araujo-Martinez,D. M. Broun,P. Carriere,M. H. Chou, T. S. Chouinard, A. N. Cleland, P. Frigola,Michael P. Kelly, A. Krasnok, N. Matavalam, A. Moro,Rhys Geoffrey Povey, T. Reid, A. Y. Smirnov

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY(2024)

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摘要
Quantum computing stands as a revolutionary frontier in information technology, with the potential to solve complex problems far beyond the capacity of classical computers. At the heart of this disruptive innovation are qubits, forming the fundamental backbone of quantum computing. A leading-edge solution for constructing robust, enduring qubits involves embedding a Josephson junction within a high Q-factor, superconducting three-dimensional cavity. Our recent innovation lies in developing a uniquely optimized, quarter-wave resonator-based superconducting cavity, functioning at 6 GHz, specifically tailored for quantum computers. In this work, we elucidate our advancement towards elevating the Q-factor tenfold, an achievement made possible through the enhancement of machining precision, the application of rigorous postprocessing techniques-including mechanical, chemical, and surface treatments-as well as the refinement of our testing methods.
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关键词
Niobium,Resonators,Surface treatment,Q-factor,Three-dimensional displays,Qubit,Conductors,quarter-wave resonator,superconducting qubit,three-dimensional (3-D) resonator
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