Extended Data Fig. 8: Site-resolved coherence metrics.
From: A tweezer array with 6,100 highly coherent atomic qubits
a, Relative difference of the qubit frequency with the caesium clock frequency fclock ≡ 9,192,631,770 Hz, measured by Ramsey interferometry. The standard deviation is 1.5 × 10−9, or 14 Hz in absolute value. b, Map and histogram of \({T}_{2}^{* }\) across the atom array. The average uncertainty per site is 1.5 ms. The average \({T}_{2}^{* }\) for sites generated by the fibre amplifier at 1,055 nm is 23.2(1) ms, whereas it is 25.58(3) ms for sites generated by the fibre amplifier at 1,061 nm. c, Map and histogram of T2 across the atom array. The average uncertainty per site is 2.8 s. The average T2 for sites generated by the fibre amplifier at 1,055 nm is 19.2(4) s, whereas it is 12.32(6) s for sites generated by the fibre amplifier at 1,061 nm. We use averages weighted by the uncertainty on each site, as we observe that the unweighted average results in a bias from the value obtained by global fitting. d, Map and histogram of single-qubit gate fidelity obtained by global randomized benchmarking. The average gate fidelity is 99.9834(2)%.
