Magnonic XNOR logic gate based on dual YIG waveguide interferometer using nonlinear spin-wave phase shift

We report on the experimental realization of a magnonic XNOR logic gate based on a nonlinear Mach–Zehnder interferometer (MZI) with yttrium iron garnet waveguides in both arms. Information in input data streams is translated into an equivalent sequence of π-phase jumps induced through the nonlinear mechanisms in continuous spin-wave signals propagating in different arms of the MZI. Constructive/destructive interference at the output combiner produces the signal corresponding to the targeted XNOR logical function. The performance characteristics of the logic gate are discussed based on the developed ad hoc theory of the nonlinear processes involved.