Interaction-free measurements with superconducting qubits

Details Interaction-free measurements with superconducting qubits Interaction-free measurements with superconducting qubits

2008-04-03

arxiv.org/abs/0804.0523v1

Phys. Rev. Lett. 97, 180406 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.97.180406

An interaction-free measurement protocol is described for a quantum circuit
consisting of a superconducting qubit and a read-out 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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