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Cavity-based architecture to preserve quantum coherence and entanglement

Quantum technology relies on the utilization of resources, like quantum coherence and entanglement, which allow quantum information and computation processing. This achievement is however jeopardized by the detrimental effects of the environment surrounding any quantum system, so that finding strate...

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Autores principales: Man, Zhong-Xiao, Xia, Yun-Jie, Lo Franco, Rosario
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4563358/
https://www.ncbi.nlm.nih.gov/pubmed/26351004
http://dx.doi.org/10.1038/srep13843
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author Man, Zhong-Xiao
Xia, Yun-Jie
Lo Franco, Rosario
author_facet Man, Zhong-Xiao
Xia, Yun-Jie
Lo Franco, Rosario
author_sort Man, Zhong-Xiao
collection PubMed
description Quantum technology relies on the utilization of resources, like quantum coherence and entanglement, which allow quantum information and computation processing. This achievement is however jeopardized by the detrimental effects of the environment surrounding any quantum system, so that finding strategies to protect quantum resources is essential. Non-Markovian and structured environments are useful tools to this aim. Here we show how a simple environmental architecture made of two coupled lossy cavities enables a switch between Markovian and non-Markovian regimes for the dynamics of a qubit embedded in one of the cavity. Furthermore, qubit coherence can be indefinitely preserved if the cavity without qubit is perfect. We then focus on entanglement control of two independent qubits locally subject to such an engineered environment and discuss its feasibility in the framework of circuit quantum electrodynamics. With up-to-date experimental parameters, we show that our architecture allows entanglement lifetimes orders of magnitude longer than the spontaneous lifetime without local cavity couplings. This cavity-based architecture is straightforwardly extendable to many qubits for scalability.
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spelling pubmed-45633582015-09-15 Cavity-based architecture to preserve quantum coherence and entanglement Man, Zhong-Xiao Xia, Yun-Jie Lo Franco, Rosario Sci Rep Article Quantum technology relies on the utilization of resources, like quantum coherence and entanglement, which allow quantum information and computation processing. This achievement is however jeopardized by the detrimental effects of the environment surrounding any quantum system, so that finding strategies to protect quantum resources is essential. Non-Markovian and structured environments are useful tools to this aim. Here we show how a simple environmental architecture made of two coupled lossy cavities enables a switch between Markovian and non-Markovian regimes for the dynamics of a qubit embedded in one of the cavity. Furthermore, qubit coherence can be indefinitely preserved if the cavity without qubit is perfect. We then focus on entanglement control of two independent qubits locally subject to such an engineered environment and discuss its feasibility in the framework of circuit quantum electrodynamics. With up-to-date experimental parameters, we show that our architecture allows entanglement lifetimes orders of magnitude longer than the spontaneous lifetime without local cavity couplings. This cavity-based architecture is straightforwardly extendable to many qubits for scalability. Nature Publishing Group 2015-09-09 /pmc/articles/PMC4563358/ /pubmed/26351004 http://dx.doi.org/10.1038/srep13843 Text en Copyright © 2015, Macmillan Publishers Limited 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
Man, Zhong-Xiao
Xia, Yun-Jie
Lo Franco, Rosario
Cavity-based architecture to preserve quantum coherence and entanglement
title Cavity-based architecture to preserve quantum coherence and entanglement
title_full Cavity-based architecture to preserve quantum coherence and entanglement
title_fullStr Cavity-based architecture to preserve quantum coherence and entanglement
title_full_unstemmed Cavity-based architecture to preserve quantum coherence and entanglement
title_short Cavity-based architecture to preserve quantum coherence and entanglement
title_sort cavity-based architecture to preserve quantum coherence and entanglement
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4563358/
https://www.ncbi.nlm.nih.gov/pubmed/26351004
http://dx.doi.org/10.1038/srep13843
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