Figure 3: Coherence decay measurements performed under the conditions necessary to load site-selectively.
From: Scalable loading of a two-dimensional trapped-ion array
(a) Measurements of the coherence in the presence and absence of neutral atom flux. (b) Coherence in the presence and absence of the 461 and 405 nm PI laser beams. For the longer delay times (open markers), spin-echo π-pulses were applied at T0, 3T0, 5T0 and 7T0, where T0=500 μs. Solid coloured lines are gaussian fits to the data markers of the same colour without using spin-echo pulses. Dashed lines are exponential fits to the measured data using spin-echo pulses in the absence of neutral atom flux and PI lasers. Error bars for all data points, which are comparable to the point size except in the inset, reflect s.e.m. from the Ramsey fringe contrast fit with quantum projection noise propagated throughout the fitting procedure. Each phase point trial was repeated 1,000 times for the primary figures and 500 times for the inset.
