Parallel Implementation of High-Fidelity Multiqubit Gates with Neutral Atoms
Name
PhysRevLett.123.170503.pdf
Description
Published version
Size
748.37 KB
Format
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Checksum (MD5)
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Author(s)
Levine, Harry
Keesling, Alexander
Semeghini, Giulia
Omran, Ahmed
Wang, Tout T
Ebadi, Sepehr
Bernien, Hannes
Greiner, Markus
Vuletić, Vladan
Pichler, Hannes
Date Issued
August 2019
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 American Physical Society. We report the implementation of universal two- A nd three-qubit entangling gates on neutral-atom qubits encoded in long-lived hyperfine ground states. The gates are mediated by excitation to strongly interacting Rydberg states and are implemented in parallel on several clusters of atoms in a one-dimensional array of optical tweezers. Specifically, we realize the controlled-phase gate, enacted by a novel, fast protocol involving only global coupling of two qubits to Rydberg states. We benchmark this operation by preparing Bell states with fidelity F≥95.0(2)%, and extract gate fidelity ≥97.4(3)%, averaged across five atom pairs. In addition, we report a proof-of-principle implementation of the three-qubit Toffoli gate, in which two control atoms simultaneously constrain the behavior of one target atom. These experiments demonstrate key ingredients for high-fidelity quantum information processing in a scalable neutral-atom platform.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.123.170503
