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Dipolar spin-exchange and entanglement between molecules in an optical tweezer array.

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Title: Dipolar spin-exchange and entanglement between molecules in an optical tweezer array.
Authors: Yicheng Bao, Yu, Scarlett S., Anderegg, Loïc, Eunmi Chae, Ketterle, Wolfgang, Kang-Kuen Ni, Doyle, John M.
Source: Science (pre-March 2025). 12/8/2023, Vol. 382 Issue 6675, p1138-1143. 6p. 1 Diagram, 5 Graphs.
Subjects: Optical tweezers, Spin exchange, Quantum computing, Quantum entanglement, Ultracold molecules
Abstract: Ultracold polar molecules are promising candidate qubits for quantum computing and quantum simulations. Their long-lived molecular rotational states form robust qubits, and the long-range dipolar interaction between molecules provides quantum entanglement. In this work, we demonstrate dipolar spin-exchange interactions between single calcium monofluoride (CaF) molecules trapped in an optical tweezer array. We realized the spin-1/2 quantum XY model by encoding an effective spin-1/2 system into the rotational states of the molecules and used it to generate a Bell state through an iSWAP operation. Conditioned on the verified existence of molecules in both tweezers at the end of the measurement, we obtained a Bell state fidelity of 0.89(6). Using interleaved tweezer arrays, we demonstrate single-site molecular addressability. [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: Dipolar spin-exchange and entanglement between molecules in an optical tweezer array.
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  Data: <searchLink fieldCode="AR" term="%22Yicheng+Bao%22">Yicheng Bao</searchLink><br /><searchLink fieldCode="AR" term="%22Yu%2C+Scarlett+S%2E%22">Yu, Scarlett S.</searchLink><br /><searchLink fieldCode="AR" term="%22Anderegg%2C+Loïc%22">Anderegg, Loïc</searchLink><br /><searchLink fieldCode="AR" term="%22Eunmi+Chae%22">Eunmi Chae</searchLink><br /><searchLink fieldCode="AR" term="%22Ketterle%2C+Wolfgang%22">Ketterle, Wolfgang</searchLink><br /><searchLink fieldCode="AR" term="%22Kang-Kuen+Ni%22">Kang-Kuen Ni</searchLink><br /><searchLink fieldCode="AR" term="%22Doyle%2C+John+M%2E%22">Doyle, John M.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 12/8/2023, Vol. 382 Issue 6675, p1138-1143. 6p. 1 Diagram, 5 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Optical+tweezers%22">Optical tweezers</searchLink><br /><searchLink fieldCode="DE" term="%22Spin+exchange%22">Spin exchange</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+computing%22">Quantum computing</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+entanglement%22">Quantum entanglement</searchLink><br /><searchLink fieldCode="DE" term="%22Ultracold+molecules%22">Ultracold molecules</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Ultracold polar molecules are promising candidate qubits for quantum computing and quantum simulations. Their long-lived molecular rotational states form robust qubits, and the long-range dipolar interaction between molecules provides quantum entanglement. In this work, we demonstrate dipolar spin-exchange interactions between single calcium monofluoride (CaF) molecules trapped in an optical tweezer array. We realized the spin-1/2 quantum XY model by encoding an effective spin-1/2 system into the rotational states of the molecules and used it to generate a Bell state through an iSWAP operation. Conditioned on the verified existence of molecules in both tweezers at the end of the measurement, we obtained a Bell state fidelity of 0.89(6). Using interleaved tweezer arrays, we demonstrate single-site molecular addressability. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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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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        Value: 10.1126/science.adf8999
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        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 1138
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      – SubjectFull: Optical tweezers
        Type: general
      – SubjectFull: Spin exchange
        Type: general
      – SubjectFull: Quantum computing
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      – SubjectFull: Quantum entanglement
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      – SubjectFull: Ultracold molecules
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      – TitleFull: Dipolar spin-exchange and entanglement between molecules in an optical tweezer array.
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              Text: 12/8/2023
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              Y: 2023
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