Entangled state generation via quantum walks with multiple coins

Abstract Generation of entangled state is of paramount importance both from quantum theoretical foundation and technology applications. Entanglement swapping provides an efficient method to generate entanglement in quantum communication protocols. However, perfect Bell measurements for qudits, the k...

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Autores principales:	Meng Li, Yun Shang
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/c6e21ac8c3d5473a89c9f2ff934be2fe
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id	oai:doaj.org-article:c6e21ac8c3d5473a89c9f2ff934be2fe
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spelling	oai:doaj.org-article:c6e21ac8c3d5473a89c9f2ff934be2fe2021-12-02T14:49:44ZEntangled state generation via quantum walks with multiple coins10.1038/s41534-021-00401-62056-6387https://doaj.org/article/c6e21ac8c3d5473a89c9f2ff934be2fe2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00401-6https://doaj.org/toc/2056-6387Abstract Generation of entangled state is of paramount importance both from quantum theoretical foundation and technology applications. Entanglement swapping provides an efficient method to generate entanglement in quantum communication protocols. However, perfect Bell measurements for qudits, the key to entanglement swapping, have been proven impossible to achieve by using only linear elements and particle detectors. To avoid this bottleneck, we propose a scheme to generate entangled state including two-qubit entangled state, two-qudit entangled state, three-qubit GHZ state and three-qudit GHZ state between several designate parties via the model of quantum walks with multiple coins. Then we conduct experimental realization of Bell state and three-qubit GHZ state between several designate parties on IBM quantum platform and the result has high fidelity by performing quantum tomography. In the end, we give a practical application of our scheme in multiparty quantum secret sharing.Meng LiYun ShangNature 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 Meng Li Yun Shang Entangled state generation via quantum walks with multiple coins
description	Abstract Generation of entangled state is of paramount importance both from quantum theoretical foundation and technology applications. Entanglement swapping provides an efficient method to generate entanglement in quantum communication protocols. However, perfect Bell measurements for qudits, the key to entanglement swapping, have been proven impossible to achieve by using only linear elements and particle detectors. To avoid this bottleneck, we propose a scheme to generate entangled state including two-qubit entangled state, two-qudit entangled state, three-qubit GHZ state and three-qudit GHZ state between several designate parties via the model of quantum walks with multiple coins. Then we conduct experimental realization of Bell state and three-qubit GHZ state between several designate parties on IBM quantum platform and the result has high fidelity by performing quantum tomography. In the end, we give a practical application of our scheme in multiparty quantum secret sharing.
format	article
author	Meng Li Yun Shang
author_facet	Meng Li Yun Shang
author_sort	Meng Li
title	Entangled state generation via quantum walks with multiple coins
title_short	Entangled state generation via quantum walks with multiple coins
title_full	Entangled state generation via quantum walks with multiple coins
title_fullStr	Entangled state generation via quantum walks with multiple coins
title_full_unstemmed	Entangled state generation via quantum walks with multiple coins
title_sort	entangled state generation via quantum walks with multiple coins
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c6e21ac8c3d5473a89c9f2ff934be2fe
work_keys_str_mv	AT mengli entangledstategenerationviaquantumwalkswithmultiplecoins AT yunshang entangledstategenerationviaquantumwalkswithmultiplecoins
_version_	1718389474333818880

Entangled state generation via quantum walks with multiple coins

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