We realized a two-spin "Gedankenexperiment" suggested by Dicke in 1954 using a system of two individually controllable superconducting qubits weakly coupled to a fast decaying microwave cavity. We demonstrate superradiance of two emitters both in time and by reconstructing the density matrix of the emitted field. The results of this work are published in Nature Communications.
Experiments on Dicke superradiance published in Nature Comm.