# Interaction-free measurements with superconducting qubits.

@article{Paraoanu2006InteractionfreeMW, title={Interaction-free measurements with superconducting qubits.}, author={Georghe S. Paraoanu}, journal={Physical review letters}, year={2006}, volume={97 18}, pages={ 180406 } }

An interaction-free measurement protocol is described for a quantum circuit consisting of a superconducting qubit and a readout Josephson junction. By measuring the state of the qubit, one 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.

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#### References

SHOWING 1-7 OF 7 REFERENCES

Science 299

- 1869
- 2003

Phys

- 37, 449 (1979); A. J. Leggett and A. Garg, Phys. Rev. Lett. 54, 857 (1985); A. J. Leggett, J. Phys. Condens. Matter 14, R415
- 2002

Phys

- Rev. Lett. 89, 117901
- 2002

Nature (London) 398

- 305 (1999); J. E. Mooij et al., Science 285, 1036 (1999); Yu. Makhlin, G. Schön, and A. Shnirman, Rev. Mod. Phys. 73, 357
- 2001

Phys

- Rev. A 58, 605 (1998); J.-S. Jang, Phys. Rev. A 59, 2322 (1999); G. Mitchison and S. Massar, Phys. Rev. A 63, 032105
- 2001

Nature (London) 398

- 786 (1999); C. H. van der Wal et al., Science 290, 773 (2000); J. R. Friedman et al., Nature (London) 406, 43
- 2000