Method for assessing atomic sources of flicker noise in superconducting qubits

Abstract Flicker noise causes decoherence in Josephson junction-based superconducting qubits, thus limiting their practical potential as building blocks for quantum computers. This is due to limited length and complexity of executable algorithms, and increased dependency on error-correcting measures...

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Autores principales:	Almog Reshef, Maytal Caspary Toroker
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
Acceso en línea:	https://doaj.org/article/03706977296541c7b15b8bbc27da347f
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spelling	oai:doaj.org-article:03706977296541c7b15b8bbc27da347f2021-12-02T18:36:13ZMethod for assessing atomic sources of flicker noise in superconducting qubits10.1038/s41524-021-00622-52057-3960https://doaj.org/article/03706977296541c7b15b8bbc27da347f2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41524-021-00622-5https://doaj.org/toc/2057-3960Abstract Flicker noise causes decoherence in Josephson junction-based superconducting qubits, thus limiting their practical potential as building blocks for quantum computers. This is due to limited length and complexity of executable algorithms, and increased dependency on error-correcting measures. Therefore, identifying and subsiding the atomic sources of flicker noise are of great importance to the development of this technology. We developed a method that combines ab initio DFT calculations and quantum dynamics to model charge transport across a Josephson junction, by which it is possible to more accurately assess different defects as sources of flicker noise. We demonstrate the use of our method in an investigation of various atomic defects, including vacancies, trapping, and substitutions, in an Al\|Al2O3\|Al Josephson junction. This demonstration both reveals weaknesses in previous attempts to pinpoint the atomic sources of flicker noise and highlights new candidates.Almog ReshefMaytal Caspary TorokerNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 7, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Almog Reshef Maytal Caspary Toroker Method for assessing atomic sources of flicker noise in superconducting qubits
description	Abstract Flicker noise causes decoherence in Josephson junction-based superconducting qubits, thus limiting their practical potential as building blocks for quantum computers. This is due to limited length and complexity of executable algorithms, and increased dependency on error-correcting measures. Therefore, identifying and subsiding the atomic sources of flicker noise are of great importance to the development of this technology. We developed a method that combines ab initio DFT calculations and quantum dynamics to model charge transport across a Josephson junction, by which it is possible to more accurately assess different defects as sources of flicker noise. We demonstrate the use of our method in an investigation of various atomic defects, including vacancies, trapping, and substitutions, in an Al\|Al2O3\|Al Josephson junction. This demonstration both reveals weaknesses in previous attempts to pinpoint the atomic sources of flicker noise and highlights new candidates.
format	article
author	Almog Reshef Maytal Caspary Toroker
author_facet	Almog Reshef Maytal Caspary Toroker
author_sort	Almog Reshef
title	Method for assessing atomic sources of flicker noise in superconducting qubits
title_short	Method for assessing atomic sources of flicker noise in superconducting qubits
title_full	Method for assessing atomic sources of flicker noise in superconducting qubits
title_fullStr	Method for assessing atomic sources of flicker noise in superconducting qubits
title_full_unstemmed	Method for assessing atomic sources of flicker noise in superconducting qubits
title_sort	method for assessing atomic sources of flicker noise in superconducting qubits
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/03706977296541c7b15b8bbc27da347f
work_keys_str_mv	AT almogreshef methodforassessingatomicsourcesofflickernoiseinsuperconductingqubits AT maytalcasparytoroker methodforassessingatomicsourcesofflickernoiseinsuperconductingqubits
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Method for assessing atomic sources of flicker noise in superconducting qubits

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