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Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator

We propose and demonstrate a read-out technique for a superconducting qubit by dispersively coupling it with a Josephson parametric oscillator. We employ a tunable quarter wavelength superconducting resonator and modulate its resonant frequency at twice its value with an amplitude surpassing the thr...

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Autores principales: Krantz, Philip, Bengtsson, Andreas, Simoen, Michaël, Gustavsson, Simon, Shumeiko, Vitaly, Oliver, W. D., Wilson, C. M., Delsing, Per, Bylander, Jonas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865746/
https://www.ncbi.nlm.nih.gov/pubmed/27156732
http://dx.doi.org/10.1038/ncomms11417
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author Krantz, Philip
Bengtsson, Andreas
Simoen, Michaël
Gustavsson, Simon
Shumeiko, Vitaly
Oliver, W. D.
Wilson, C. M.
Delsing, Per
Bylander, Jonas
author_facet Krantz, Philip
Bengtsson, Andreas
Simoen, Michaël
Gustavsson, Simon
Shumeiko, Vitaly
Oliver, W. D.
Wilson, C. M.
Delsing, Per
Bylander, Jonas
author_sort Krantz, Philip
collection PubMed
description We propose and demonstrate a read-out technique for a superconducting qubit by dispersively coupling it with a Josephson parametric oscillator. We employ a tunable quarter wavelength superconducting resonator and modulate its resonant frequency at twice its value with an amplitude surpassing the threshold for parametric instability. We map the qubit states onto two distinct states of classical parametric oscillation: one oscillating state, with 185±15 photons in the resonator, and one with zero oscillation amplitude. This high contrast obviates a following quantum-limited amplifier. We demonstrate proof-of-principle, single-shot read-out performance, and present an error budget indicating that this method can surpass the fidelity threshold required for quantum computing.
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spelling pubmed-48657462016-05-24 Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator Krantz, Philip Bengtsson, Andreas Simoen, Michaël Gustavsson, Simon Shumeiko, Vitaly Oliver, W. D. Wilson, C. M. Delsing, Per Bylander, Jonas Nat Commun Article We propose and demonstrate a read-out technique for a superconducting qubit by dispersively coupling it with a Josephson parametric oscillator. We employ a tunable quarter wavelength superconducting resonator and modulate its resonant frequency at twice its value with an amplitude surpassing the threshold for parametric instability. We map the qubit states onto two distinct states of classical parametric oscillation: one oscillating state, with 185±15 photons in the resonator, and one with zero oscillation amplitude. This high contrast obviates a following quantum-limited amplifier. We demonstrate proof-of-principle, single-shot read-out performance, and present an error budget indicating that this method can surpass the fidelity threshold required for quantum computing. Nature Publishing Group 2016-05-09 /pmc/articles/PMC4865746/ /pubmed/27156732 http://dx.doi.org/10.1038/ncomms11417 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Krantz, Philip
Bengtsson, Andreas
Simoen, Michaël
Gustavsson, Simon
Shumeiko, Vitaly
Oliver, W. D.
Wilson, C. M.
Delsing, Per
Bylander, Jonas
Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title_full Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title_fullStr Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title_full_unstemmed Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title_short Single-shot read-out of a superconducting qubit using a Josephson parametric oscillator
title_sort single-shot read-out of a superconducting qubit using a josephson parametric oscillator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865746/
https://www.ncbi.nlm.nih.gov/pubmed/27156732
http://dx.doi.org/10.1038/ncomms11417
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