2011 Issue №10

Evolution operator of a combined system consisting of the measured qubit and the auxiliary system is derived. Conditions on the choice of parameters in the formula for the reconstruction of the measured qubit states are obtained. The evolution operator of the combined system leads to the probability operator (or effect) with a structure that corresponds to unsharp measurements.

Features of work of the asymmetrical vibrator are considered. The analysis of various operating conditions is made. Calculation of optimal model of the aerial is made.

On the basis of the analysis of principles of duplex system, the model of radio system with reverse connect is obtained. It provide the work of ten duplex channels on one frequency at one antenna in programmable regime of radio-station frequency change.