Multipartite entanglement of billions of motional atoms heralded by single photon
Abstract Quantum theory does not prevent entanglement from being created and observed in macroscopic physical systems, in reality however, the accessible scale of entanglement is still very limited due to decoherence effects. Recently, entanglement has been observed among atoms from thousands to mil...
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doaj-e308c3ded0094616882b39e25ae76a5f2021-10-10T11:18:14ZengNature Publishing Groupnpj Quantum Information2056-63872021-10-01711910.1038/s41534-021-00476-1Multipartite entanglement of billions of motional atoms heralded by single photonHang Li0Jian-Peng Dou1Xiao-Ling Pang2Chao-Ni Zhang3Zeng-Quan Yan4Tian-Huai Yang5Jun Gao6Jia-Ming Li7Xian-Min Jin8Center for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversitySchool of Physics and Astronomy, Shanghai Jiao Tong UniversityCenter for Integrated Quantum Information Technologies (IQIT), School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong UniversityAbstract Quantum theory does not prevent entanglement from being created and observed in macroscopic physical systems, in reality however, the accessible scale of entanglement is still very limited due to decoherence effects. Recently, entanglement has been observed among atoms from thousands to millions levels in extremely low-temperature and well isolated systems. Here, we create multipartite entanglement of billions of motional atoms in a quantum memory at room temperature and certify the genuine entanglement via M-separability witness associated with photon statistics. The information contained in a single photon is found strongly correlated with the excitation shared by the motional atoms, which intrinsically address the large system and therefore stimulate the multipartite entanglement. Remarkably, our heralded and quantum memory built-in entanglement generation allows us to directly observe the dynamic evolution of entanglement depth and further to reveal the effects of decoherence. Our results verify the existence of genuine multipartite entanglement among billions of motional atoms at ambient conditions, significantly extending the boundary of the accessible scale of entanglement.https://doi.org/10.1038/s41534-021-00476-1 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hang Li Jian-Peng Dou Xiao-Ling Pang Chao-Ni Zhang Zeng-Quan Yan Tian-Huai Yang Jun Gao Jia-Ming Li Xian-Min Jin |
spellingShingle |
Hang Li Jian-Peng Dou Xiao-Ling Pang Chao-Ni Zhang Zeng-Quan Yan Tian-Huai Yang Jun Gao Jia-Ming Li Xian-Min Jin Multipartite entanglement of billions of motional atoms heralded by single photon npj Quantum Information |
author_facet |
Hang Li Jian-Peng Dou Xiao-Ling Pang Chao-Ni Zhang Zeng-Quan Yan Tian-Huai Yang Jun Gao Jia-Ming Li Xian-Min Jin |
author_sort |
Hang Li |
title |
Multipartite entanglement of billions of motional atoms heralded by single photon |
title_short |
Multipartite entanglement of billions of motional atoms heralded by single photon |
title_full |
Multipartite entanglement of billions of motional atoms heralded by single photon |
title_fullStr |
Multipartite entanglement of billions of motional atoms heralded by single photon |
title_full_unstemmed |
Multipartite entanglement of billions of motional atoms heralded by single photon |
title_sort |
multipartite entanglement of billions of motional atoms heralded by single photon |
publisher |
Nature Publishing Group |
series |
npj Quantum Information |
issn |
2056-6387 |
publishDate |
2021-10-01 |
description |
Abstract Quantum theory does not prevent entanglement from being created and observed in macroscopic physical systems, in reality however, the accessible scale of entanglement is still very limited due to decoherence effects. Recently, entanglement has been observed among atoms from thousands to millions levels in extremely low-temperature and well isolated systems. Here, we create multipartite entanglement of billions of motional atoms in a quantum memory at room temperature and certify the genuine entanglement via M-separability witness associated with photon statistics. The information contained in a single photon is found strongly correlated with the excitation shared by the motional atoms, which intrinsically address the large system and therefore stimulate the multipartite entanglement. Remarkably, our heralded and quantum memory built-in entanglement generation allows us to directly observe the dynamic evolution of entanglement depth and further to reveal the effects of decoherence. Our results verify the existence of genuine multipartite entanglement among billions of motional atoms at ambient conditions, significantly extending the boundary of the accessible scale of entanglement. |
url |
https://doi.org/10.1038/s41534-021-00476-1 |
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