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Using Qubits to Measure Fidelity in Mesoscopic Systems
release_pzmjetcbnvfodiiysyrfpdvcdm
by
G.B. Lesovik, F. Hassler, G. Blatter
Released
as a article
.
(2006)
Abstract
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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