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Quantum bit‐error rate in plug‐and‐play quantum key distribution systems caused by axial magnetic fields
Author(s) -
Mecozzi A.,
Antonelli C.,
Brodsky M.
Publication year - 2009
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200900085
Subject(s) - quantum key distribution , faraday cage , physics , quantum , magnetic field , formalism (music) , faraday effect , statistical physics , computer science , computational physics , quantum mechanics , art , musical , visual arts
Abstract We provide a formalism for the polarization evolution in plug and play quantum key distribution systems, and adapt this formalism for the aggregate Faraday effect in fibers arising from an axial magnetic field. We show the implication of such field on detector readings, and offer a formal expression for quantum bit‐error rate (QBER) for these systems. Assuming a Maxwellian statistics for the Faraday angle, as predicted by recent analytical and numerical studies, we finally calculate the average QBER.