Projects per year
Abstract
We present a robust protocol for implementing high-fidelity multiqubit controlled phase gates (CkZ) on neutral atom qubits coupled to highly excited Rydberg states. Our approach is based on extending adiabatic rapid passage to two-photon excitation via a short-lived intermediate excited state common to alkali-atom Rydberg experiments, accounting for the full impact of spontaneous decay and differential AC Stark shifts from the complete manifold of hyperfine excited states. We evaluate and optimise gate performance, concluding that for Cs and currently available laser frequencies and powers, a CCZ gate with fidelity F > 0.995 for three qubits and CCCZ with F > 0.99 for four qubits is attainable in ∼ 1.8 μs via this protocol. Higher fidelities are accessible with future technologies, and our results highlight the utility of neutral atom arrays for the native implementation of multiqubit unitaries.
Original language | English |
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Article number | 045020 |
Number of pages | 12 |
Journal | Quantum Science and Technology |
Volume | 7 |
Issue number | 4 |
Early online date | 19 Jul 2022 |
DOIs | |
Publication status | Published - 17 Aug 2022 |
Keywords
- Ryberg states
- alkali-atom Ryberg experiments
- atom qubits
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Dive into the research topics of 'High-fidelity multiqubit Rydberg gates via two-photon adiabatic rapid passage'. Together they form a unique fingerprint.Projects
- 1 Active
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Scalable Qubit Arrays for Quantum Computation and Optimisation (M Squared Prosperity Partnership)
Pritchard, J. (Principal Investigator), Daley, A. (Co-investigator) & Riis, E. (Co-investigator)
M Squared Lasers Ltd, EPSRC (Engineering and Physical Sciences Research Council)
5/02/20 → 4/08/25
Project: Research
Datasets
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Data for: "High-fidelity multiqubit Rydberg gates via two-photon adiabatic rapid passage"
Pelegri, G. (Creator), Daley, A. (Creator) & Pritchard, J. (Creator), University of Strathclyde, 14 Dec 2021
DOI: 10.15129/23d507a1-8ec6-44ec-b11e-13e97d90a394
Dataset
Activities
- 1 Invited talk
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Scalable Qubit Arrays for Quantum Computation and Optimisation
Pritchard, J. (Speaker)
31 Mar 2023Activity: Talk or presentation types › Invited talk