Abstract: A family of Hamiltonians generating the dynamics of a quantum particle evolving in an array of localized quantum scatterers with a finite number of internal degrees of freedom is presented. We use such kind of Hamiltonians to build up models of (almost) solvable quantum environments in order to investigate the dynamics of the entanglement and the onset of a classical behavior in in quantum systems. The main technical tool we utilize is a modern version of the theory of self-adjoint extensions of symmetric operators