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

Abstract 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 large...

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Autores principales:	Yi-Mu Du, Li-Hua Lu, You-Quan Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/68f99ae8d6cc4a879985b2017cd81736
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spelling	oai:doaj.org-article:68f99ae8d6cc4a879985b2017cd817362021-12-02T15:08:04ZA Rout to Protect Quantum Gates constructed via quantum walks from Noises10.1038/s41598-018-25550-12045-2322https://doaj.org/article/68f99ae8d6cc4a879985b2017cd817362018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25550-1https://doaj.org/toc/2045-2322Abstract 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.Yi-Mu DuLi-Hua LuYou-Quan LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yi-Mu Du Li-Hua Lu You-Quan Li A Rout to Protect Quantum Gates constructed via quantum walks from Noises
description	Abstract 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.
format	article
author	Yi-Mu Du Li-Hua Lu You-Quan Li
author_facet	Yi-Mu Du Li-Hua Lu You-Quan Li
author_sort	Yi-Mu Du
title	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_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_sort	rout to protect quantum gates constructed via quantum walks from noises
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/68f99ae8d6cc4a879985b2017cd81736
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A Rout to Protect Quantum Gates constructed via quantum walks from Noises

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