Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array
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We demonstrate high fidelity two-qubit Rydberg blockade and entanglement on a pair of sites in a large two-dimensional qubit array. The qubit array is defined by a grid of blue detuned lines of light with 121 sites for trapping atomic qubits. Improved experimental methods have increased the observed Bell state fidelity to F_{Bell}=0.86(2). Accounting for errors in state preparation and measurement we infer a fidelity of F_{Bell}^{-SPAM}=0.88. Accounting for errors in single qubit operations we infer that a Bell state created with the Rydberg mediated C_{Z} gate has a fidelity of F_{Bell}^{C_{Z}}=0.89. Comparison with a detailed error model based on quantum process matrices indicates that finite atom temperature and laser noise are the dominant error sources contributing to the observed gate infidelity.
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In neutral atom quantum computers, the amount of crosstalk is usually moderate.
“In neutral atom quantum computers, the amount of crosstalk is usually moderate [63,64]”
From Neutral atom quantum computing hardware: performance and end-user perspective (2023) · cites this paper as [64]
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Collectively Encoded Rydberg Qubit
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Simple, passive design for large optical trap arrays for single atoms
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- Authors
- Graham, T. M., Kwon, M., Grinkemeyer, B., Marra, Z., Jiang, X., Lichtman, M. T., Sun, Y., Ebert, M., & Saffman, M.
- Affiliations
- University of Wisconsin–Madison (US)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2019-12-04
- Volume
- 123
- Issue
- 23
- Pages
- 230501-230501
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2967003869
- Cited by
- 293
- References
- 41
- Citations by year
- 2026: 16 · 2025: 45 · 2024: 35 · 2023: 42 · 2022: 56 · 2021: 47 · 2020: 48 · 2019: 4
- FWCI
- 17.88
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (PHY-1720220)
- Association of Research Libraries
- U.S. Department of Energy (DE-SC0019465)
- ColdQuanta, Inc.
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Cold Atom Physics and Bose-Einstein Condensates
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- Rydberg blockade, two-qubit entanglement, neutral atom qubits, Bell state fidelity, error analysis, laser noise, state preparation and measurement errors
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