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

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [5];  [5]
  1. Univ. of Wisconsin, Madison, WI (United States); University of Wisconsin, Madison
  2. Univ. of Wisconsin, Madison, WI (United States)
  3. Univ. of Wisconsin, Madison, WI (United States); Univ. of Maryland, College Park, MD (United States)
  4. Univ. of Wisconsin, Madison, WI (United States); Chinese Academy of Sciences (CAS), Shanghai (China)
  5. 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 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.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Grant/Contract Number:
SC0019465
OSTI ID:
1593526
Alternate ID(s):
OSTI ID: 1782730
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 123; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (23)

Speed, retention loss, and motional heating of atoms in an optical conveyor belt journal June 2020
Enhanced atom-by-atom assembly of arbitrary tweezer arrays journal December 2020
Freedom of the mixer rotation axis improves performance in the quantum approximate optimization algorithm journal December 2021
Transition Slow-Down by Rydberg Interaction of Neutral Atoms and a Fast Controlled-not Quantum Gate journal November 2020
Optimal Mapping for Near-Term Quantum Architectures based on Rydberg Atoms conference November 2021
Scalability and high-efficiency of an $(n+1)$-qubit Toffoli gate sphere via blockaded Rydberg atoms preprint January 2020
Characterization of Errors in Interferometry with Entangled Atoms text January 2020
Generating Target Graph Couplings for QAOA from Native Quantum Hardware Couplings text January 2020
Rydberg quantum computation with nuclear spins in two-electron neutral atoms text January 2021
Optimal model for fewer-qubit CNOT gates with Rydberg atoms text January 2021
Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms journal January 2020
Assessment of Rydberg atoms for wideband electric field sensing journal January 2020
Preparation of a heteronuclear two-atom system in the three-dimensional ground state in an optical tweezer journal December 2019
Nondestructive Rydberg parity meter and its applications journal January 2020
Scalable quantum computing with qudits on a graph journal February 2020
Suppressing Motional Dephasing of Ground-Rydberg Transition for High-Fidelity Quantum Control with Neutral Atoms journal February 2020
Controlled Phase Gate Protocol for Neutral Atoms via Off-Resonant Modulated Driving journal February 2020
Unitary and Nonunitary Quantum Cellular Automata with Rydberg Arrays journal February 2020
Laser Trapping of Circular Rydberg Atoms journal March 2020
Suppress motional dephasing of ground-Rydberg transition for high-fidelity quantum control with neutral atoms text January 2019
Scalable quantum computing with qudits on a graph text January 2019
Laser Trapping of Circular Rydberg Atoms text January 2019
Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms text January 2021

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