Figure 3

The general Elitzur–Vaidman bomb experiment. (a) The original optical setup [32] used a series of MZIs to detect the bomb multiple times. (b) Quantum circuit for the experiment. The \(R_{y}(\theta _{i})\) replaces the H gate for control over the reflectivity; an extension from Fig. 2(b). (c) Our experiment data from the IBMQ Valencia. Since Valencia is a 5-qubit computer, the experiment extends to 4 stages. Device errors are 7.2%, 10.3%, 13.8%, 19.0% for stage \(n=2,3,4,5\), respectively. Standard deviations for all points are shown as error bars, with the largest at 0.087