doi: 10.1103/PhysRevLett.97.180406.
Epub 2006 Nov 1.
Interaction-free measurements with superconducting qubits
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- PMID: 17155523
- DOI: 10.1103/PhysRevLett.97.180406
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Interaction-free measurements with superconducting qubits
Phys Rev Lett.
.
Abstract
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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