  This work provides a complete description of entanglement properties between
electrons inside coupled quantum molecules, nanoestructures which consist of
two quantum dots. Each electron can tunnel between the two quantum dots inside
the molecule, being also coupled by Coulomb interaction. First, it is shown
that Bell states act as a natural basis for the description of this physical
system, defining the characteristics of the energy spectrum and the
eigenstates. Then, the entanglement properties of the eigenstates are
discussed, shedding light on the roles of each physical parameters on
experimental setup. Finally, a detailed analysis of the dynamics shows the path
to generate states with a high degree of entanglement, as well as physical
conditions associated with coherent oscillations between separable and Bell
states.
