Extended Data Fig. 2: FIG. M2. Single atom control.
From: Long-lived Bell states in an array of optical clock qubits
a) Tight atomic confinement and a 550 G magnetic field enable a clock Rabi frequency above 1 kHz with π-pulse fidelity well above 99%; however, fidelity is limited to 99.41(57)% in part by atomic heating (which also causes dephasing at later times, see SI). Inset shows the corresponding clock transition π-pulse spectrum. b) A UV laser near 317 nm drives a clock-Rydberg transition with Rabi with frequency Ωr = 2π × 13 MHz. We detect the Rydberg state via loss of the clock state atoms. The horizontal dashed line represents an 89% Rydberg detection fidelity estimated from branching ratios of intermediate triplet S states (see text).
