Fig. 3: Waiting-time distributions \({{{{{{{\mathcal{W}}}}}}}}\).

a Waiting times τ between single-electron tunneling out of the right island. The theory curve given by Eq. (3) agrees well with the measurements. b Waiting times τ between single-electron tunneling out of the left island followed by single-electron tunneling out of the right island. Note that the peak at the short times is more than two orders of magnitude higher than the long time data. The experimental data is well-captured by Eq. (4). The dashed line serves as a guide to the eye. The inset illustrates the waiting times between tunneling events of the same or different types. The blue lines correspond to tunneling out of the right island, while the red ones correspond to the left island. The error bars mark 1σ confidence intervals.