Fig. 5
From: Experimental study of multiple-shot unitary channels discrimination using the IBM Q computers
Probability of successful discrimination between the unitary operator \(U = \sqrt{X} \textrm{RZ}(\frac{-\pi }{2N}) \sqrt{X}\) and \(V = \sqrt{X} \textrm{RZ}(\frac{\pi }{2N}) \sqrt{X}\), where N is number of copies of unknown unitary, plotted as a function of the width of hybrid rectangular scheme, using the short measurement. The blue line corresponds to the results obtained directly from IBM Brisbane, while the red line represents the results after error mitigation using MThree package52,53. Figure (a) illustrates the performance of hybrid schemes with 4 copies in total, Figure (b) corresponds to hybrid schemes with 16 copies in total, and Figure (c) corresponds to hybrid schemes with 32 copies in total. Each circuit was executed with 10,000 shots.
