Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems

Knowing the level of entanglement robustness against quantum bit loss or decoherence mechanisms is an important issue for any application of quantum information. Fidelity of states can be used to judge whether there is entanglement in multi-particle systems. It is well known that quantum channel sec...

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Autores principales:	Jiaqiang Zhao, Meijiao Wang, Lianzhen Cao, Yang Yang, Xia Liu, Qinwei Zhang, Huaixin Lu, Kellie Ann Driscoll
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	quantum entanglement tripartite entanglement new Bell-type inequality non-classicality bit-flip noise Science Q Astrophysics QB460-466 Physics QC1-999
Acceso en línea:	https://doaj.org/article/4d3cb98c2f1c49d6adbfcd3191c62a46
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spelling	oai:doaj.org-article:4d3cb98c2f1c49d6adbfcd3191c62a462021-11-25T17:30:25ZExperimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems10.3390/e231115141099-4300https://doaj.org/article/4d3cb98c2f1c49d6adbfcd3191c62a462021-11-01T00:00:00Zhttps://www.mdpi.com/1099-4300/23/11/1514https://doaj.org/toc/1099-4300Knowing the level of entanglement robustness against quantum bit loss or decoherence mechanisms is an important issue for any application of quantum information. Fidelity of states can be used to judge whether there is entanglement in multi-particle systems. It is well known that quantum channel security in QKD can be estimated by measuring the robustness of Bell-type inequality against noise. We experimentally investigate a new Bell-type inequality (NBTI) in the three-photon Greenberger–Horne–Zeilinger (GHZ) states with different levels of spin-flip noise. The results show that the fidelity and the degree of violation of the NBTI decrease monotonically with the increase of noise intensity. They also provide a method to judge whether there is entanglement in three-particle mixed states.Jiaqiang ZhaoMeijiao WangLianzhen CaoYang YangXia LiuQinwei ZhangHuaixin LuKellie Ann DriscollMDPI AGarticlequantum entanglementtripartite entanglementnew Bell-type inequalitynon-classicalitybit-flip noiseScienceQAstrophysicsQB460-466PhysicsQC1-999ENEntropy, Vol 23, Iss 1514, p 1514 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	quantum entanglement tripartite entanglement new Bell-type inequality non-classicality bit-flip noise Science Q Astrophysics QB460-466 Physics QC1-999
spellingShingle	quantum entanglement tripartite entanglement new Bell-type inequality non-classicality bit-flip noise Science Q Astrophysics QB460-466 Physics QC1-999 Jiaqiang Zhao Meijiao Wang Lianzhen Cao Yang Yang Xia Liu Qinwei Zhang Huaixin Lu Kellie Ann Driscoll Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
description	Knowing the level of entanglement robustness against quantum bit loss or decoherence mechanisms is an important issue for any application of quantum information. Fidelity of states can be used to judge whether there is entanglement in multi-particle systems. It is well known that quantum channel security in QKD can be estimated by measuring the robustness of Bell-type inequality against noise. We experimentally investigate a new Bell-type inequality (NBTI) in the three-photon Greenberger–Horne–Zeilinger (GHZ) states with different levels of spin-flip noise. The results show that the fidelity and the degree of violation of the NBTI decrease monotonically with the increase of noise intensity. They also provide a method to judge whether there is entanglement in three-particle mixed states.
format	article
author	Jiaqiang Zhao Meijiao Wang Lianzhen Cao Yang Yang Xia Liu Qinwei Zhang Huaixin Lu Kellie Ann Driscoll
author_facet	Jiaqiang Zhao Meijiao Wang Lianzhen Cao Yang Yang Xia Liu Qinwei Zhang Huaixin Lu Kellie Ann Driscoll
author_sort	Jiaqiang Zhao
title	Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
title_short	Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
title_full	Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
title_fullStr	Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
title_full_unstemmed	Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems
title_sort	experimental investigation of the robustness of a new bell-type inequality of triphoton ghz states in open systems
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4d3cb98c2f1c49d6adbfcd3191c62a46
work_keys_str_mv	AT jiaqiangzhao experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT meijiaowang experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT lianzhencao experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT yangyang experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT xialiu experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT qinweizhang experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT huaixinlu experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems AT kellieanndriscoll experimentalinvestigationoftherobustnessofanewbelltypeinequalityoftriphotonghzstatesinopensystems
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Experimental Investigation of the Robustness of a New Bell-Type Inequality of Triphoton GHZ States in Open Systems

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