Entangling two transportable neutral atoms via local spin exchange.
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| Title: | Entangling two transportable neutral atoms via local spin exchange. |
|---|---|
| Authors: | Kaufman, A. M., Lester, B. J., Foss-Feig, M., Wall, M. L., Rey, A. M., Regal, C. A. |
| Source: | Nature. 11/12/2015, Vol. 527 Issue 7577, p208-211. 4p. 2 Diagrams, 2 Graphs. |
| Subjects: | Spin exchange, Quantum entanglement, Qubits, Ground state (Quantum mechanics), Optical tweezers |
| Abstract: | To advance quantum information science, physical systems are sought that meet the stringent requirements for creating and preserving quantum entanglement. In atomic physics, robust two-qubit entanglement is typically achieved by strong, long-range interactions in the form of either Coulomb interactions between ions or dipolar interactions between Rydberg atoms. Although such interactions allow fast quantum gates, the interacting atoms must overcome the associated coupling to the environment and cross-talk among qubits. Local interactions, such as those requiring substantial wavefunction overlap, can alleviate these detrimental effects; however, such interactions present a new challenge: to distribute entanglement, qubits must be transported, merged for interaction, and then isolated for storage and subsequent operations. Here we show how, using a mobile optical tweezer, it is possible to prepare and locally entangle two ultracold neutral atoms, and then separate them while preserving their entanglement. Ground-state neutral atom experiments have measured dynamics consistent with spin entanglement, and have detected entanglement with macroscopic observables; we are now able to demonstrate position-resolved two-particle coherence via application of a local gradient and parity measurements. This new entanglement-verification protocol could be applied to arbitrary spin-entangled states of spatially separated atoms. The local entangling operation is achieved via spin-exchange interactions, and quantum tunnelling is used to combine and separate atoms. These techniques provide a framework for dynamically entangling remote qubits via local operations within a large-scale quantum register. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature 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 |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 111020975 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Entangling two transportable neutral atoms via local spin exchange. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kaufman%2C+A%2E+M%2E%22">Kaufman, A. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Lester%2C+B%2E+J%2E%22">Lester, B. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Foss-Feig%2C+M%2E%22">Foss-Feig, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Wall%2C+M%2E+L%2E%22">Wall, M. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Rey%2C+A%2E+M%2E%22">Rey, A. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Regal%2C+C%2E+A%2E%22">Regal, C. A.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 11/12/2015, Vol. 527 Issue 7577, p208-211. 4p. 2 Diagrams, 2 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Spin+exchange%22">Spin exchange</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+entanglement%22">Quantum entanglement</searchLink><br /><searchLink fieldCode="DE" term="%22Qubits%22">Qubits</searchLink><br /><searchLink fieldCode="DE" term="%22Ground+state+%28Quantum+mechanics%29%22">Ground state (Quantum mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+tweezers%22">Optical tweezers</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To advance quantum information science, physical systems are sought that meet the stringent requirements for creating and preserving quantum entanglement. In atomic physics, robust two-qubit entanglement is typically achieved by strong, long-range interactions in the form of either Coulomb interactions between ions or dipolar interactions between Rydberg atoms. Although such interactions allow fast quantum gates, the interacting atoms must overcome the associated coupling to the environment and cross-talk among qubits. Local interactions, such as those requiring substantial wavefunction overlap, can alleviate these detrimental effects; however, such interactions present a new challenge: to distribute entanglement, qubits must be transported, merged for interaction, and then isolated for storage and subsequent operations. Here we show how, using a mobile optical tweezer, it is possible to prepare and locally entangle two ultracold neutral atoms, and then separate them while preserving their entanglement. Ground-state neutral atom experiments have measured dynamics consistent with spin entanglement, and have detected entanglement with macroscopic observables; we are now able to demonstrate position-resolved two-particle coherence via application of a local gradient and parity measurements. This new entanglement-verification protocol could be applied to arbitrary spin-entangled states of spatially separated atoms. The local entangling operation is achieved via spin-exchange interactions, and quantum tunnelling is used to combine and separate atoms. These techniques provide a framework for dynamically entangling remote qubits via local operations within a large-scale quantum register. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=111020975 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature16073 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 208 Subjects: – SubjectFull: Spin exchange Type: general – SubjectFull: Quantum entanglement Type: general – SubjectFull: Qubits Type: general – SubjectFull: Ground state (Quantum mechanics) Type: general – SubjectFull: Optical tweezers Type: general Titles: – TitleFull: Entangling two transportable neutral atoms via local spin exchange. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kaufman, A. M. – PersonEntity: Name: NameFull: Lester, B. J. – PersonEntity: Name: NameFull: Foss-Feig, M. – PersonEntity: Name: NameFull: Wall, M. L. – PersonEntity: Name: NameFull: Rey, A. M. – PersonEntity: Name: NameFull: Regal, C. A. IsPartOfRelationships: – BibEntity: Dates: – D: 12 M: 11 Text: 11/12/2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 527 – Type: issue Value: 7577 Titles: – TitleFull: Nature Type: main |
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