Tuesday, 11 April, 2006
Correlation-Induced Resonances in Transport through Coupled Quantum Dots
V. Meden and F. Marquardt -
Phys. Rev. Lett. 96, 146801 (2006)
We investigate the effect of local electron correlations on transport through parallel quantum dots. The linear conductance as a function of gate voltage is strongly affected by the interplay of the interaction U and quantum interference. We find a pair of novel correlation-induced resonances separated by an energy scale that depends exponentially on U. The effect is robust against a small detuning of the dot energy levels and occurs for arbitrary generic tunnel couplings. It should be observable in experiments on the basis of presently existing double-dot setups.