Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array

Graham, T. M.; Kwon, M.; Grinkemeyer, B.; Marra, Z.; Jiang, X.; Lichtman, M. T.; Sun, Y.; Ebert, M.; Saffman, M.

doi:10.1103/PhysRevLett.123.230501

Title: Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array

Journal Article · Sun Dec 01 00:00:00 EST 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.123.230501· OSTI ID:1593526

Graham, T. M. ^[1];

^[1];

^[1]; Marra, Z. ^[1]; Jiang, X. ^[1];

^[2]; Sun, Y. ^[3];

^[4];

^[4]

Univ. of Wisconsin, Madison, WI (United States)
Univ. of Wisconsin, Madison, WI (United States); Univ. of Maryland, College Park, MD (United States)
Univ. of Wisconsin, Madison, WI (United States); Chinese Academy of Sciences (CAS), Shanghai (China)
Univ. of Wisconsin, Madison, WI (United States); ColdQuanta, Inc., Madison, WI (United States)

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$$^{-SPAM}_{Bell}$$=0.88. Accounting for errors in single qubit operations we infer that a Bell state created with the Rydberg mediated CZ gate has a fidelity of F$$^{C_Z}_{Bell}$$=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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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

Grant/Contract Number:: SC0019465; PHY-1720220

OSTI ID:: 1593526

Alternate ID(s):: OSTI ID: 1782730

Journal Information:: Physical Review Letters, Vol. 123, Issue 23; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 140 works

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