Engineering two-qubit mixed states with weak measurements

Abstract

It is known that protocols based on weak measurements can be used to steer quantum systems into predesignated pure states. Here we show that weak-measurement-based steering protocols can be harnessed for on-demand engineering of mixed states. In particular, through a continuous variation of the protocol parameters, one can guide a classical target state to a discorded one, and further on, toward an entangled target state.