[PDF] Interaction-free measurements with superconducting qubits. | Semantic Scholar
@article{Paraoanu2006InteractionfreeMW, title={Interaction-free measurements with superconducting qubits.}, author={G. S. Paraoanu}, journal={Physical review letters}, year={2006}, volume={97 18}, pages={ 180406 }, url={https://api.semanticscholar.org/CorpusID:24376135} }
An interaction-free measurement protocol is described for a quantum circuit consisting of a superconducting qubit and a readout Josephson junction that can ascertain the presence of a current pulse through the circuit at a previous time without any energy exchange between the quBit and the pulse.