Using Qubits to Measure Fidelity in Mesoscopic Systems
Mesoscale and Nanoscale Physics
2007-05-23 v3 Quantum Physics
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.
Keywords
Cite
@article{arxiv.cond-mat/0507200,
title = {Using Qubits to Measure Fidelity in Mesoscopic Systems},
author = {G. B. Lesovik and F. Hassler and G. Blatter},
journal= {arXiv preprint arXiv:cond-mat/0507200},
year = {2007}
}
Comments
5 pages, 1 figure