Quantum efficiency of binary-outcome detectors of solid-state qubits

Details Quantum efficiency of binary-outcome detectors of solid-state qubits Quantum efficiency of binary-outcome detectors of solid-state qubits

2008-06-23

arxiv.org/abs/0806.3614v1

Phys. Rev. B 78, 174512 (2008)

Physics

Quantum Physics

11 pages

Scientific paper

10.1103/PhysRevB.78.174512

We discuss definitions of the quantum efficiency for binary-outcome qubit detectors with imperfect fidelity, focusing on the subclass of quantum non-demolition detectors. Quantum efficiency is analyzed for several models of detectors, including indirect projective measurement, linear detector in binary-outcome regime, detector of the superconducting phase qubit, and detector based on tunneling into continuum.

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