Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification

Abstract We propose an entanglement-creation scheme in a multi-atom ensemble trapped in an optical cavity, named entanglement amplification, converting unentangled states into entangled states and amplifying less-entangled ones to maximally entangled Greenberger-Horne-Zeilinger (GHZ) states whose fi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yajuan Zhao, Rui Zhang, Wenlan Chen, Xiang-Bin Wang, Jiazhong Hu
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/5a3c362a2f1f4f1cacabe20069e3fd27
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5a3c362a2f1f4f1cacabe20069e3fd27
record_format	dspace
spelling	oai:doaj.org-article:5a3c362a2f1f4f1cacabe20069e3fd272021-12-02T10:44:23ZCreation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification10.1038/s41534-021-00364-82056-6387https://doaj.org/article/5a3c362a2f1f4f1cacabe20069e3fd272021-02-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00364-8https://doaj.org/toc/2056-6387Abstract We propose an entanglement-creation scheme in a multi-atom ensemble trapped in an optical cavity, named entanglement amplification, converting unentangled states into entangled states and amplifying less-entangled ones to maximally entangled Greenberger-Horne-Zeilinger (GHZ) states whose fidelity is logarithmically dependent on the atom number and robust against common experimental noises. The scheme starts with a multi-atom ensemble initialized in a coherent spin state. By shifting the energy of a particular Dicke state, we break the Hilbert space of the ensemble into two isolated subspaces to tear the coherent spin state into two components so that entanglement is introduced. After that, we utilize the isolated subspaces to further enhance the entanglement by coherently separating the two components. By single-particle Rabi drivings on atoms in a high-finesse optical cavity illuminated by a single-frequency light, 2000-atom GHZ states can be created with a fidelity above 80% in an experimentally achievable system, making resources of ensembles at Heisenberg limit practically available for quantum metrology.Yajuan ZhaoRui ZhangWenlan ChenXiang-Bin WangJiazhong HuNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-6 (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 Yajuan Zhao Rui Zhang Wenlan Chen Xiang-Bin Wang Jiazhong Hu Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
description	Abstract We propose an entanglement-creation scheme in a multi-atom ensemble trapped in an optical cavity, named entanglement amplification, converting unentangled states into entangled states and amplifying less-entangled ones to maximally entangled Greenberger-Horne-Zeilinger (GHZ) states whose fidelity is logarithmically dependent on the atom number and robust against common experimental noises. The scheme starts with a multi-atom ensemble initialized in a coherent spin state. By shifting the energy of a particular Dicke state, we break the Hilbert space of the ensemble into two isolated subspaces to tear the coherent spin state into two components so that entanglement is introduced. After that, we utilize the isolated subspaces to further enhance the entanglement by coherently separating the two components. By single-particle Rabi drivings on atoms in a high-finesse optical cavity illuminated by a single-frequency light, 2000-atom GHZ states can be created with a fidelity above 80% in an experimentally achievable system, making resources of ensembles at Heisenberg limit practically available for quantum metrology.
format	article
author	Yajuan Zhao Rui Zhang Wenlan Chen Xiang-Bin Wang Jiazhong Hu
author_facet	Yajuan Zhao Rui Zhang Wenlan Chen Xiang-Bin Wang Jiazhong Hu
author_sort	Yajuan Zhao
title	Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
title_short	Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
title_full	Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
title_fullStr	Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
title_full_unstemmed	Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification
title_sort	creation of greenberger-horne-zeilinger states with thousands of atoms by entanglement amplification
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5a3c362a2f1f4f1cacabe20069e3fd27
work_keys_str_mv	AT yajuanzhao creationofgreenbergerhornezeilingerstateswiththousandsofatomsbyentanglementamplification AT ruizhang creationofgreenbergerhornezeilingerstateswiththousandsofatomsbyentanglementamplification AT wenlanchen creationofgreenbergerhornezeilingerstateswiththousandsofatomsbyentanglementamplification AT xiangbinwang creationofgreenbergerhornezeilingerstateswiththousandsofatomsbyentanglementamplification AT jiazhonghu creationofgreenbergerhornezeilingerstateswiththousandsofatomsbyentanglementamplification
_version_	1718396763498348544

Creation of Greenberger-Horne-Zeilinger states with thousands of atoms by entanglement amplification

Ejemplares similares