IKBFU's Vestnik

2011 Issue №10

The reconstruction of the measured qubit under the unsharp measure-ments

Abstract

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.

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