Parallel Implementation of High-Fidelity Multiqubit Gates with Neutral Atoms
Levine, Harry, Keesling, Alexander, Semeghini, Giulia, Omran, Ahmed, et al. · 2019 · Physical Review Letters
| 编号 NA063 | 主题 原生门、寻址、脉冲与标定 | DOI 10.1103/physrevlett.123.170503 |
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2019 · Physical Review Letters We report the implementation of universal two- and 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 , and extract gate fidelity 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.
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