Quantum transport through double-dot Aharonov-Bohm interferometry in Coulomb blockade regime

Abstract

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. 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 $\Phi ={\Phi }_0/2$ and $\Phi =0$ respectively; in the latter, partially coherent transport exhibits an oscillation with magnetic flux having a period of ${\Phi }_0$.

8 pages, 3 figures

References in corpus (6)

• The Kondo Effect in the Unitary Limit
• Tuning of the Fano Effect through a Quantum Dot in an Aharonov-Bohm Interferometer
• Coherent coupling of two quantum dots embedded in an Aharonov-Bohm ring
• Flux-Dependent Level Attraction in Double-Dot Aharonov-Bohm Interferometers
• Interference in interacting quantum dots with spin
• Interference and interaction effects in multi-level quantum dots

Cited by in corpus (2)

• Time-dependent resonant tunneling for a parallel-coupled double quantum dots
• First-order coherent resonant tunneling through an interacting coupled-quantum-dot interferometer: generic quantum rate equations and current noise