Место издания:Multiprint ( ООО ”ПКЦ АЛЬТЕКС” ) Moscow
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Аннотация:We have considered relativistic luxon dynamics governed by the sine-Gordon
equation and afected by short spatial inhomogeneities of the driving force and
thermal noise. Developed analytical and numerical methods for calculation
of luxon scattering at the inhomogeneities allowed us to examine the scatter-
ing as a measurement tool for sensitive detection of superconducting lux qubit
states. Diferent measurement schemes based on the scattering were optimized
for signal-to-noise ratio maximization. The scattering was also considered as a
tool for manipulation with the qubit states. Analysis of this type of manipula-
tions with qubit states was performed in the frame of fully quantum description
both analytically and numerically. In terms of the simplest model of two-level
system with magnetic moment we analyzed the possibility of fast magnetization
reversal on the picosecond timescale induced by unipolar magnetic pulse. In ad-
dition, consideration of the magnetization reversal is fulilled in the framework
of the macroscopic theory of the magnetic moment allowing the comparison and
the explanation of quantum and classical behavior.
