A Rout to Protect Quantum Gates constructed via quantum walks from Noises

The continuous-time quantum walk on a one-dimensional graph of odd number of sites with an on-site potential at the center is studied. We show that such a quantum-walk system can construct an X-gate of a single qubit as well as a control gate for two qubits, when the potential is much larger than th...

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Autores principales: Du, Yi-Mu, Lu, Li-Hua, Li, You-Quan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940792/
https://www.ncbi.nlm.nih.gov/pubmed/29740079
http://dx.doi.org/10.1038/s41598-018-25550-1
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author Du, Yi-Mu
Lu, Li-Hua
Li, You-Quan
author_facet Du, Yi-Mu
Lu, Li-Hua
Li, You-Quan
author_sort Du, Yi-Mu
collection PubMed
description The continuous-time quantum walk on a one-dimensional graph of odd number of sites with an on-site potential at the center is studied. We show that such a quantum-walk system can construct an X-gate of a single qubit as well as a control gate for two qubits, when the potential is much larger than the hopping strength. We investigate the decoherence effect and find that the coherence time can be enhanced by either increasing the number of sites on the graph or the ratio of the potential to the hopping strength, which is expected to motivate the design of the quantum gate with long coherence time. We also suggest several experimental proposals to realize such a system.
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spelling pubmed-59407922018-05-11 A Rout to Protect Quantum Gates constructed via quantum walks from Noises Du, Yi-Mu Lu, Li-Hua Li, You-Quan Sci Rep Article The continuous-time quantum walk on a one-dimensional graph of odd number of sites with an on-site potential at the center is studied. We show that such a quantum-walk system can construct an X-gate of a single qubit as well as a control gate for two qubits, when the potential is much larger than the hopping strength. We investigate the decoherence effect and find that the coherence time can be enhanced by either increasing the number of sites on the graph or the ratio of the potential to the hopping strength, which is expected to motivate the design of the quantum gate with long coherence time. We also suggest several experimental proposals to realize such a system. Nature Publishing Group UK 2018-05-08 /pmc/articles/PMC5940792/ /pubmed/29740079 http://dx.doi.org/10.1038/s41598-018-25550-1 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Du, Yi-Mu
Lu, Li-Hua
Li, You-Quan
A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title_full A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title_fullStr A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title_full_unstemmed A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title_short A Rout to Protect Quantum Gates constructed via quantum walks from Noises
title_sort rout to protect quantum gates constructed via quantum walks from noises
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940792/
https://www.ncbi.nlm.nih.gov/pubmed/29740079
http://dx.doi.org/10.1038/s41598-018-25550-1
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