Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels

Abstract Einstein–Podolsky–Rosen (EPR) steering is a useful resource for secure quantum information tasks. It is crucial to investigate the effect of inevitable loss and noise in quantum channels on EPR steering. We analyze and experimentally demonstrate the influence of purity of quantum states and...

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Autores principales:	Xiaowei Deng, Yang Liu, Meihong Wang, Xiaolong Su, Kunchi Peng
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/b24dec531d0f4206a7c1bcf1493101d3
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spelling	oai:doaj.org-article:b24dec531d0f4206a7c1bcf1493101d32021-12-02T16:55:35ZSudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels10.1038/s41534-021-00399-x2056-6387https://doaj.org/article/b24dec531d0f4206a7c1bcf1493101d32021-04-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00399-xhttps://doaj.org/toc/2056-6387Abstract Einstein–Podolsky–Rosen (EPR) steering is a useful resource for secure quantum information tasks. It is crucial to investigate the effect of inevitable loss and noise in quantum channels on EPR steering. We analyze and experimentally demonstrate the influence of purity of quantum states and excess noise on Gaussian EPR steering by distributing a two-mode squeezed state through lossy and noisy channels, respectively. We show that the impurity of state never leads to sudden death of Gaussian EPR steering, but the noise in quantum channel can. Then we revive the disappeared Gaussian EPR steering by establishing a correlated noisy channel. Different from entanglement, the sudden death and revival of Gaussian EPR steering are directional. Our result confirms that EPR steering criteria proposed by Reid and I. Kogias et al. are equivalent in our case. The presented results pave way for asymmetric quantum information processing exploiting Gaussian EPR steering in noisy environment.Xiaowei DengYang LiuMeihong WangXiaolong SuKunchi PengNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Xiaowei Deng Yang Liu Meihong Wang Xiaolong Su Kunchi Peng Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
description	Abstract Einstein–Podolsky–Rosen (EPR) steering is a useful resource for secure quantum information tasks. It is crucial to investigate the effect of inevitable loss and noise in quantum channels on EPR steering. We analyze and experimentally demonstrate the influence of purity of quantum states and excess noise on Gaussian EPR steering by distributing a two-mode squeezed state through lossy and noisy channels, respectively. We show that the impurity of state never leads to sudden death of Gaussian EPR steering, but the noise in quantum channel can. Then we revive the disappeared Gaussian EPR steering by establishing a correlated noisy channel. Different from entanglement, the sudden death and revival of Gaussian EPR steering are directional. Our result confirms that EPR steering criteria proposed by Reid and I. Kogias et al. are equivalent in our case. The presented results pave way for asymmetric quantum information processing exploiting Gaussian EPR steering in noisy environment.
format	article
author	Xiaowei Deng Yang Liu Meihong Wang Xiaolong Su Kunchi Peng
author_facet	Xiaowei Deng Yang Liu Meihong Wang Xiaolong Su Kunchi Peng
author_sort	Xiaowei Deng
title	Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
title_short	Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
title_full	Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
title_fullStr	Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
title_full_unstemmed	Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels
title_sort	sudden death and revival of gaussian einstein–podolsky–rosen steering in noisy channels
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b24dec531d0f4206a7c1bcf1493101d3
work_keys_str_mv	AT xiaoweideng suddendeathandrevivalofgaussianeinsteinpodolskyrosensteeringinnoisychannels AT yangliu suddendeathandrevivalofgaussianeinsteinpodolskyrosensteeringinnoisychannels AT meihongwang suddendeathandrevivalofgaussianeinsteinpodolskyrosensteeringinnoisychannels AT xiaolongsu suddendeathandrevivalofgaussianeinsteinpodolskyrosensteeringinnoisychannels AT kunchipeng suddendeathandrevivalofgaussianeinsteinpodolskyrosensteeringinnoisychannels
_version_	1718382820632559616

Sudden death and revival of Gaussian Einstein–Podolsky–Rosen steering in noisy channels

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