Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam

Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam We present low-temperature measurements of low-loss superconducting nanowire-embedded resonators in the low-power limit relevant for quantum circuits. The superconducting resonators are embedded with superconducting nanowires with widths down to 20 nm using a neon focused ion beam. In the low-power limit, we demonstrate an internal quality factor up to 3.9×105 at 300 mK [implying a two-level-system-limited quality factor up to 2×105 at 10 mK], not only significantly higher than in similar devices but also matching the state of the art of conventional Josephson-junction-embedded resonators. We also show a high sensitivity of the nanowire to stray infrared photons, which is controllable by suitable precautions to minimize stray photons in the sample environment. Our results suggest that there are excellent prospects for superconducting-nanowire-based quantum circuits. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Applied American Physical Society (APS)

Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam

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Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam

Abstract

We present low-temperature measurements of low-loss superconducting nanowire-embedded resonators in the low-power limit relevant for quantum circuits. The superconducting resonators are embedded with superconducting nanowires with widths down to 20 nm using a neon focused ion beam. In the low-power limit, we demonstrate an internal quality factor up to 3.9×105 at 300 mK [implying a two-level-system-limited quality factor up to 2×105 at 10 mK], not only significantly higher than in similar devices but also matching the state of the art of conventional Josephson-junction-embedded resonators. We also show a high sensitivity of the nanowire to stray infrared photons, which is controllable by suitable precautions to minimize stray photons in the sample environment. Our results suggest that there are excellent prospects for superconducting-nanowire-based quantum circuits.
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Publisher
The American Physical Society
Copyright
Copyright © Published by the American Physical Society
eISSN
2331-7019
D.O.I.
10.1103/PhysRevApplied.8.014039
Publisher site
See Article on Publisher Site

Abstract

We present low-temperature measurements of low-loss superconducting nanowire-embedded resonators in the low-power limit relevant for quantum circuits. The superconducting resonators are embedded with superconducting nanowires with widths down to 20 nm using a neon focused ion beam. In the low-power limit, we demonstrate an internal quality factor up to 3.9×105 at 300 mK [implying a two-level-system-limited quality factor up to 2×105 at 10 mK], not only significantly higher than in similar devices but also matching the state of the art of conventional Josephson-junction-embedded resonators. We also show a high sensitivity of the nanowire to stray infrared photons, which is controllable by suitable precautions to minimize stray photons in the sample environment. Our results suggest that there are excellent prospects for superconducting-nanowire-based quantum circuits.

Journal

Physical Review AppliedAmerican Physical Society (APS)

Published: Jul 1, 2017

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