High Impedance Titanium Nitride Resonators for Defect Spectroscopy in Superconducting Circuits
ORAL
Abstract
Defects known as two-level systems represent a significant channel of energy relaxation in superconducting circuits. Therefore, it is essential to perform spectroscopy on individual defects to understand their microscopic origins and to mitigate defect-induced loss channels. High impedance resonators are powerful tools for defect spectroscopy due to their ultra-small electric mode volume and the ability to strongly couple to individual defects. In this work, we present the design, fabrication, and characterization of titanium nitride nanowire resonators on silicon. We observe strong coupling between electrically tunable defects and the resonator modes. Additionally, we discuss our progress on integrating high impedance resonators on suspended silicon membranes for mechanical control of defects.
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Presenters
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Zihuai Zhang
University of California, Berkeley and Lawrence Berkeley National Laboratory, University of California, Berkeley
Authors
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Zihuai Zhang
University of California, Berkeley and Lawrence Berkeley National Laboratory, University of California, Berkeley
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Alp Sipahigil
University of California Berkeley, University of California, Berkeley, University of California, Berkeley and Lawrence Berkeley National Laboratory