ИСТИНА

The principal possibility of implementation of the simplest logical operations on pico second timescale has been confirmed by both analytical and numerical modelling of dynamics of superconducting flux qubit in magnetic field. Individual current pulses, propagating through distributed Josephson junctions and transmission lines of rapid single flux quantum logic have been proved to be an instrument for realization of such an operation. Using of flux-qubit interaction affecting the so-called X-components of the «Josephson atom» Hamiltonian has been shown to be the way of realization of the simplest coherent manipulations on «Josephson atom» states. The methods of approximate analytical (by matrix exponent) and exact numerical research of magnetic moment dynamics in two- and three level systems have been developed for the cases of both oscillating and unipolar magnetic fields.