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Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs
One of the important functions in a communication network is the distribution of information. It is not a problem to accomplish this in a classical system since classical information can be copied at will. However, challenges arise in quantum system because extra quantum noise is often added when th...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4960621/ https://www.ncbi.nlm.nih.gov/pubmed/27458089 http://dx.doi.org/10.1038/srep30214 |
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author | Guo, Xueshi Li, Xiaoying Liu, Nannan Ou, Z. Y. |
author_facet | Guo, Xueshi Li, Xiaoying Liu, Nannan Ou, Z. Y. |
author_sort | Guo, Xueshi |
collection | PubMed |
description | One of the important functions in a communication network is the distribution of information. It is not a problem to accomplish this in a classical system since classical information can be copied at will. However, challenges arise in quantum system because extra quantum noise is often added when the information content of a quantum state is distributed to various users. Here, we experimentally demonstrate a quantum information tap by using a fiber optical parametric amplifier (FOPA) with correlated inputs, whose noise is reduced by the destructive quantum interference through quantum entanglement between the signal and the idler input fields. By measuring the noise figure of the FOPA and comparing with a regular FOPA, we observe an improvement of 0.7 ± 0.1 dB and 0.84 ± 0.09 dB from the signal and idler outputs, respectively. When the low noise FOPA functions as an information splitter, the device has a total information transfer coefficient of T(s)+T(i) = 1.5 ± 0.2, which is greater than the classical limit of 1. Moreover, this fiber based device works at the 1550 nm telecom band, so it is compatible with the current fiber-optical network for quantum information distribution. |
format | Online Article Text |
id | pubmed-4960621 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-49606212016-08-05 Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs Guo, Xueshi Li, Xiaoying Liu, Nannan Ou, Z. Y. Sci Rep Article One of the important functions in a communication network is the distribution of information. It is not a problem to accomplish this in a classical system since classical information can be copied at will. However, challenges arise in quantum system because extra quantum noise is often added when the information content of a quantum state is distributed to various users. Here, we experimentally demonstrate a quantum information tap by using a fiber optical parametric amplifier (FOPA) with correlated inputs, whose noise is reduced by the destructive quantum interference through quantum entanglement between the signal and the idler input fields. By measuring the noise figure of the FOPA and comparing with a regular FOPA, we observe an improvement of 0.7 ± 0.1 dB and 0.84 ± 0.09 dB from the signal and idler outputs, respectively. When the low noise FOPA functions as an information splitter, the device has a total information transfer coefficient of T(s)+T(i) = 1.5 ± 0.2, which is greater than the classical limit of 1. Moreover, this fiber based device works at the 1550 nm telecom band, so it is compatible with the current fiber-optical network for quantum information distribution. Nature Publishing Group 2016-07-26 /pmc/articles/PMC4960621/ /pubmed/27458089 http://dx.doi.org/10.1038/srep30214 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 Guo, Xueshi Li, Xiaoying Liu, Nannan Ou, Z. Y. Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title | Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title_full | Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title_fullStr | Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title_full_unstemmed | Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title_short | Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
title_sort | quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4960621/ https://www.ncbi.nlm.nih.gov/pubmed/27458089 http://dx.doi.org/10.1038/srep30214 |
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