Persistent current oscillations in a series-coupled double quantum dot embedded in a mesoscopic ring

The properties of the ground state of a series‐coupled double quantum dot embedded in a mesoscopic ring in the Kondo regime are studied theoretically by means of a two‐impurity Anderson Hamiltonian. The Hamiltonian is solved by means of the slave‐boson mean‐field theory. It is shown that two dots can be coupled coherently, which is reflected in the appearance of parity effects and the complex current–phase relation in this system. So this system might be a possible candidate for future device applications. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)