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X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles

Heralded entanglement between macroscopical samples is an important resource for present quantum technology protocols, allowing quantum communication over large distances. In such protocols, optical photons are typically used as information and entanglement carriers between macroscopic quantum memor...

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Autores principales: Liao, Wen-Te, Keitel, Christoph H., Pálffy, Adriana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5027545/
https://www.ncbi.nlm.nih.gov/pubmed/27640348
http://dx.doi.org/10.1038/srep33361
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author Liao, Wen-Te
Keitel, Christoph H.
Pálffy, Adriana
author_facet Liao, Wen-Te
Keitel, Christoph H.
Pálffy, Adriana
author_sort Liao, Wen-Te
collection PubMed
description Heralded entanglement between macroscopical samples is an important resource for present quantum technology protocols, allowing quantum communication over large distances. In such protocols, optical photons are typically used as information and entanglement carriers between macroscopic quantum memories placed in remote locations. Here we investigate theoretically a new implementation which employs more robust x-ray quanta to generate heralded entanglement between two crystal-hosted macroscopical nuclear ensembles. Mössbauer nuclei in the two crystals interact collectively with an x-ray spontaneous parametric down conversion photon that generates heralded macroscopical entanglement with coherence times of approximately 100 ns at room temperature. The quantum phase between the entangled crystals can be conveniently manipulated by magnetic field rotations at the samples. The inherent long nuclear coherence times allow also for mechanical manipulations of the samples, for instance to check the stability of entanglement in the x-ray setup. Our results pave the way for first quantum communication protocols that use x-ray qubits.
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spelling pubmed-50275452016-09-22 X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles Liao, Wen-Te Keitel, Christoph H. Pálffy, Adriana Sci Rep Article Heralded entanglement between macroscopical samples is an important resource for present quantum technology protocols, allowing quantum communication over large distances. In such protocols, optical photons are typically used as information and entanglement carriers between macroscopic quantum memories placed in remote locations. Here we investigate theoretically a new implementation which employs more robust x-ray quanta to generate heralded entanglement between two crystal-hosted macroscopical nuclear ensembles. Mössbauer nuclei in the two crystals interact collectively with an x-ray spontaneous parametric down conversion photon that generates heralded macroscopical entanglement with coherence times of approximately 100 ns at room temperature. The quantum phase between the entangled crystals can be conveniently manipulated by magnetic field rotations at the samples. The inherent long nuclear coherence times allow also for mechanical manipulations of the samples, for instance to check the stability of entanglement in the x-ray setup. Our results pave the way for first quantum communication protocols that use x-ray qubits. Nature Publishing Group 2016-09-19 /pmc/articles/PMC5027545/ /pubmed/27640348 http://dx.doi.org/10.1038/srep33361 Text en Copyright © 2016, The Author(s) 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
Liao, Wen-Te
Keitel, Christoph H.
Pálffy, Adriana
X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title_full X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title_fullStr X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title_full_unstemmed X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title_short X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
title_sort x-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5027545/
https://www.ncbi.nlm.nih.gov/pubmed/27640348
http://dx.doi.org/10.1038/srep33361
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