Control of the persistent currents in two interacting quantum rings through the Coulomb interaction and inter-ring tunneling

摘要

The persistent current in two vertically coupled quantum rings containing fewelectrons is studied. We find that the Coulomb interaction between the rings inthe absence of tunneling affects the persistent current in each ring and theground state configurations. Quantum tunneling between the rings alterssignificantly the ground state and the persistent current in the system.