Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate

Long coherence times are a key property of superconducting qubits, but in conventional Al-based Josephson junctions they are limited by microscopic two-level systems. Here, NbN-based qubits on Si promise to overcome this limitation, showing an energy relaxation time T1 = 16.3 μs and a spin-echo deph...

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Autores principales:	Sunmi Kim, Hirotaka Terai, Taro Yamashita, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kunihiro Inomata, Kouichi Semba
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/f98021a90974464fb7b8f563bc894cbb
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spelling	oai:doaj.org-article:f98021a90974464fb7b8f563bc894cbb2021-12-02T18:14:15ZEnhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate10.1038/s43246-021-00204-42662-4443https://doaj.org/article/f98021a90974464fb7b8f563bc894cbb2021-09-01T00:00:00Zhttps://doi.org/10.1038/s43246-021-00204-4https://doaj.org/toc/2662-4443Long coherence times are a key property of superconducting qubits, but in conventional Al-based Josephson junctions they are limited by microscopic two-level systems. Here, NbN-based qubits on Si promise to overcome this limitation, showing an energy relaxation time T1 = 16.3 μs and a spin-echo dephasing time T2 = 21.5 μs.Sunmi KimHirotaka TeraiTaro YamashitaWei QiuTomoko FuseFumiki YoshiharaSahel AshhabKunihiro InomataKouichi SembaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENCommunications Materials, Vol 2, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Sunmi Kim Hirotaka Terai Taro Yamashita Wei Qiu Tomoko Fuse Fumiki Yoshihara Sahel Ashhab Kunihiro Inomata Kouichi Semba Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
description	Long coherence times are a key property of superconducting qubits, but in conventional Al-based Josephson junctions they are limited by microscopic two-level systems. Here, NbN-based qubits on Si promise to overcome this limitation, showing an energy relaxation time T1 = 16.3 μs and a spin-echo dephasing time T2 = 21.5 μs.
format	article
author	Sunmi Kim Hirotaka Terai Taro Yamashita Wei Qiu Tomoko Fuse Fumiki Yoshihara Sahel Ashhab Kunihiro Inomata Kouichi Semba
author_facet	Sunmi Kim Hirotaka Terai Taro Yamashita Wei Qiu Tomoko Fuse Fumiki Yoshihara Sahel Ashhab Kunihiro Inomata Kouichi Semba
author_sort	Sunmi Kim
title	Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
title_short	Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
title_full	Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
title_fullStr	Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
title_full_unstemmed	Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
title_sort	enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f98021a90974464fb7b8f563bc894cbb
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Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate

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