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

Abstract

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 C Z gate has a fidelity of F$$^{C_Z}_{Bell}$$ = 0.89. Finally, 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.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [4]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Wisconsin, Madison, WI (United States); Univ. of Maryland, College Park, MD (United States)
  3. Univ. of Wisconsin, Madison, WI (United States); Chinese Academy of Sciences (CAS), Shanghai (China)
  4. Univ. of Wisconsin, Madison, WI (United States); ColdQuanta, Inc., Madison, WI (United States)
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
OSTI Identifier:
1593526
Grant/Contract Number:  
SC0019465; PHY-1720220
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 23; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; atom & ion trapping & guiding; quantum gates; quantum information architecture & platforms

Citation Formats

Graham, T. M., Kwon, M., Grinkemeyer, B., Marra, Z., Jiang, X., Lichtman, M. T., Sun, Y., Ebert, M., and Saffman, M. Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.230501.
Graham, T. M., Kwon, M., Grinkemeyer, B., Marra, Z., Jiang, X., Lichtman, M. T., Sun, Y., Ebert, M., & Saffman, M. Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array. United States. doi:10.1103/PhysRevLett.123.230501.
Graham, T. M., Kwon, M., Grinkemeyer, B., Marra, Z., Jiang, X., Lichtman, M. T., Sun, Y., Ebert, M., and Saffman, M. Sun . "Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array". United States. doi:10.1103/PhysRevLett.123.230501.
@article{osti_1593526,
title = {Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array},
author = {Graham, T. M. and Kwon, M. and Grinkemeyer, B. and Marra, Z. and Jiang, X. and Lichtman, M. T. and Sun, Y. and Ebert, M. and Saffman, M.},
abstractNote = {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 FBell=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. Finally, 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.},
doi = {10.1103/PhysRevLett.123.230501},
journal = {Physical Review Letters},
number = 23,
volume = 123,
place = {United States},
year = {2019},
month = {12}
}

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