Bell states and entanglement dynamics on two coupled quantum molecules

摘要

This work provides a complete description of entanglement properties betweenelectrons inside coupled quantum molecules, nanoestructures which consist oftwo quantum dots. Each electron can tunnel between the two quantum dots insidethe molecule, being also coupled by Coulomb interaction. First, it is shownthat Bell states act as a natural basis for the description of this physicalsystem, defining the characteristics of the energy spectrum and theeigenstates. Then, the entanglement properties of the eigenstates arediscussed, shedding light on the roles of each physical parameters onexperimental setup. Finally, a detailed analysis of the dynamics shows the pathto generate states with a high degree of entanglement, as well as physicalconditions associated with coherent oscillations between separable and Bellstates.