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

Graham, T. M., Kwon, M., Grinkemeyer, B., Marra, Z., et al. · 2019 · Physical Review Letters

| 编号 NA064 | 主题 原生门、寻址、脉冲与标定 | DOI 10.1103/physrevlett.123.230501 |

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2019 · Physical Review Letters We demonstrate high fidelity two-qubit Rydberg blockade and entanglement in a 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 $F_{\mathrm{Bell}}=0.86(2)$. Accounting for errors in state preparation and measurement (SPAM) we infer a fidelity of $F_{\mathrm{Bell}}^{-\mathrm{SPAM}}=0.88$. 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 $F_{\mathrm{Bell}}^{C_Z}=0.89$. 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.

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