Entanglement and teleportation in chains of graphene quantum dots

The main characteristic of good standard teleportation protocol is to provide maximum fidelity better than the classical one. We find that a system of electrons in a chain of graphene quantum dots can ensure this requirement. Starting from the characterization of the bound states in quantum dots, based on ribbons of graphene with armchair boundaries, we derive the effective Hamiltonian that describes an open chain of spin-1/2 particles. We propose a configuration by which the nearest-neighbours dimerized interactions along the chain can ensure long distance entanglement between the outer sites. Through numerical results we highlight the trend of the entanglement and the maximum fidelity with respect to the parameters describing the graphene quantum dots chain.