Andreev Spectroscopy for Superconducting Phase Qubits

Details Andreev Spectroscopy for Superconducting Phase Qubits Andreev Spectroscopy for Superconducting Phase Qubits

1999-10-31

arxiv.org/abs/cond-mat/9910506v1

Physics

Condensed Matter

LaTeX 2.09, 11 pages, 2 eps-figures; special LaTeX style file included. Contribution to the Proceedings of "Electron Transport

Scientific paper

We propose a new method to measure the coherence time of superconducting
phase qubits based on the analysis of the magnetic-field dependent dc nonlinear
Andreev current across a high-resistance tunnel contact between the qubit and a
dirty metal wire and derive a quantitative relation between the subgap I-V
characteristic and the internal correlation function of the qubit.

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