Minimal model of quantum measurements and emergence of classical domain

We propose a minimalistic model of quantum measurements within a finite system that undergoes a regular unitary evolution. Based on information theory, the measurement process requires a sacrifice of information entropy. This loss in our model is represented by a single cubit being isolated from the rest of the system. As a result of the partitioning, the classical domain emerges and the measurement occurs. The effect of the measurement on the quantum state of the system can be described by the generalized projection operator, which in general is less restrictive than the traditional wave function collapse.