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Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits.

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Title: Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits.
Authors: Song, Chao, Xu, Kai, Li, Hekang, Zhang, Yu-Ran, Zhang, Xu, Liu, Wuxin, Guo, Qiujiang, Wang, Zhen, Ren, Wenhui, Hao, Jie, Feng, Hui, Fan, Heng, Zheng, Dongning, Wang, Da-Wei, Wang, H., Zhu, Shi-Yao
Source: Science (pre-March 2025). 8/9/2019, Vol. 365 Issue 6453, p574-577. 4p. 3 Diagrams.
Subjects: Quantum theory, Quantum information science, Superconductivity, Rydberg states, Electromagnetic fields
Abstract: Multipartite entangled states are crucial for numerous applications in quantum information science. However, the generation and verification of multipartite entanglement on fully controllable and scalable quantum platforms remains an outstanding challenge. We report the deterministic generation of an 18-qubit Greenberger-Horne-Zeilinger (GHZ) state and multicomponent atomic Schrödinger cat states of up to 20 qubits on a quantum processor, which features 20 superconducting qubits, also referred to as artificial atoms, interconnected by a bus resonator. By engineering a one-axis twisting Hamiltonian, the system of qubits, once initialized, coherently evolves to multicomponent atomic Schrödinger cat states—that is, superpositions of atomic coherent states including the GHZ state—at specific time intervals as expected. Our approach on a solid-state platform should not only stimulate interest in exploring the fundamental physics of quantum many-body systems, but also enable the development of applications in practical quantum metrology and quantum information processing. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Chao%22">Song, Chao</searchLink><br /><searchLink fieldCode="AR" term="%22Xu%2C+Kai%22">Xu, Kai</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Hekang%22">Li, Hekang</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yu-Ran%22">Zhang, Yu-Ran</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Xu%22">Zhang, Xu</searchLink><br /><searchLink fieldCode="AR" term="%22Liu%2C+Wuxin%22">Liu, Wuxin</searchLink><br /><searchLink fieldCode="AR" term="%22Guo%2C+Qiujiang%22">Guo, Qiujiang</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhen%22">Wang, Zhen</searchLink><br /><searchLink fieldCode="AR" term="%22Ren%2C+Wenhui%22">Ren, Wenhui</searchLink><br /><searchLink fieldCode="AR" term="%22Hao%2C+Jie%22">Hao, Jie</searchLink><br /><searchLink fieldCode="AR" term="%22Feng%2C+Hui%22">Feng, Hui</searchLink><br /><searchLink fieldCode="AR" term="%22Fan%2C+Heng%22">Fan, Heng</searchLink><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Dongning%22">Zheng, Dongning</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Da-Wei%22">Wang, Da-Wei</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+H%2E%22">Wang, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Shi-Yao%22">Zhu, Shi-Yao</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 8/9/2019, Vol. 365 Issue 6453, p574-577. 4p. 3 Diagrams.
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  Data: <searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+information+science%22">Quantum information science</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Rydberg+states%22">Rydberg states</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+fields%22">Electromagnetic fields</searchLink>
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  Data: Multipartite entangled states are crucial for numerous applications in quantum information science. However, the generation and verification of multipartite entanglement on fully controllable and scalable quantum platforms remains an outstanding challenge. We report the deterministic generation of an 18-qubit Greenberger-Horne-Zeilinger (GHZ) state and multicomponent atomic Schrödinger cat states of up to 20 qubits on a quantum processor, which features 20 superconducting qubits, also referred to as artificial atoms, interconnected by a bus resonator. By engineering a one-axis twisting Hamiltonian, the system of qubits, once initialized, coherently evolves to multicomponent atomic Schrödinger cat states—that is, superpositions of atomic coherent states including the GHZ state—at specific time intervals as expected. Our approach on a solid-state platform should not only stimulate interest in exploring the fundamental physics of quantum many-body systems, but also enable the development of applications in practical quantum metrology and quantum information processing. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Superconductivity
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      – SubjectFull: Rydberg states
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      – SubjectFull: Electromagnetic fields
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      – TitleFull: Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits.
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              Text: 8/9/2019
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