Quantum transport through double-dot Aharonov-Bohm interferometry in Coulomb blockade regime
Department of Physics, Shanghai Jiaotong University, 1954 Huashan Road,
Shanghai 200030, P.R. China
Corresponding author: a email@example.com
Published online: 30 January 2004
Transport through two quantum dots laterally embedded in Aharonov-Bohm interferometry with infinite intradot and arbitrary interdot Coulomb repulsion is analyzed in the weak coupling and Coulomb blockade regime. By employing the modified quantum rate equations and the slave-boson approach, we establish a general dc current formula at temperatures higher than the Kondo temperature for the case that the spin degenerate levels of two dots are close to each other. For further discussion, we examine two simple examples for identical dots - no doubly occupied states and no empty state. In the former, completely destructive coherent transport and phase locking appear at magnetic flux and respectively; in the latter, partially coherent transport exhibits an oscillation with magnetic flux having a period of .
PACS: 73.21.La – Quantum dots / 73.23.-b – Electronic transport in mesoscopic systems / 73.23.Hk – Coulomb blockade and single-electron tunneling.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003