Figure 2. Experimental demonstration of the R_x and R_z operations via the LZS interference.

(a) Illustration of the LZS interference evolution in the four different time stages of the driven pulses, indicated by the solid dots. The diagrams in the below schematically illustrate the circuits for unitary transformations on one qubit and the resulting evolution of the qubit trajectories on the Bloch sphere. The bracket highlights the decomposition of the arbitrary single-qubit operation. (b) Under a short driven pulse, the charge-stability diagram in Fig. 1c has been largely altered and a sequence of additional lines has emerged. (c) The construction interference finger locations ε₀^(N) (dots) along the line in (b) as a function of the interference order N. The error bars are determined from the least-squares fit to the data. The solid line is obtained from a theoretical expression.