Using Qubits to Measure Fidelity in Mesoscopic Systems release_pzmjetcbnvfodiiysyrfpdvcdm

by G.B. Lesovik, F. Hassler, G. Blatter

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We point out the similarities in the definition of the `fidelity' of a quantum system and the generating function determining the full counting statistics of charge transport through a quantum wire and suggest to use flux- or charge qubits for their measurement. As an application we use the notion of fidelity within a first-quantized formalism in order to derive new results and insights on the generating function of the full counting statistics.
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Type  article
Stage   accepted
Date   2006-12-29
Version   v3
Language   en ?
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