1. High-kinetic inductance NbN films for high-quality compact superconducting resonators
- Author
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Frasca, Simone, Arabadzhiev, Ivo Nikolaev, de Puechredon, Sebastien Yves Bros, Oppliger, Fabian, Jouanny, Vincent, Musio, Roberto, Scigliuzzo, Marco, Minganti, Fabrizio, Scarlino, Pasquale, and Charbon, Edoardo
- Subjects
Quantum Physics ,Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Applied Physics - Abstract
Niobium nitride (NbN) is a particularly promising material for quantum technology applications, as entails the degree of reproducibility necessary for large-scale of superconducting circuits. We demonstrate that resonators based on NbN thin films present a one-photon internal quality factor above 10$^5$ maintaining a high impedance (larger than 2k$\Omega$), with a footprint of approximately 50x100 $\mu$m$^2$ and a self-Kerr nonlinearity of few tenths of Hz. These quality factors, mostly limited by losses induced by the coupling to two-level systems, have been maintained for kinetic inductances ranging from tenths to hundreds of pH/square. We also demonstrate minimal variations in the performance of the resonators during multiple cooldowns over more than nine months. Our work proves the versatility of niobium nitride high-kinetic inductance resonators, opening perspectives towards the fabrication of compact, high-impedance and high-quality multimode circuits, with sizable interactions., Comment: 12 pages, 8 figures
- Published
- 2023
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