Extended Data Fig. 5: Fidelity measurements of beam-splitters.
From: Scalable and programmable phononic network with trapped ions
We calculate the population fidelity of beam-splitters between modes (a) 1 and 2, (b) 2 and 4, (c) 1 and 3, (d) 3 and 4, using data shown in Fig. 2. The blue circles represent the calculated fidelity, and the blue dashed lines represent the linear fitting results. The intersection of the blue and red lines represents the fidelities of the 50:50 beam splitters. All the data points occur in the figures were obtained from the mean value of 100 samples, and the error bars represent 95% confidence intervals.
