Swapping entangled Kondo resonances in parallel-coupled double quantum dots

Abstract

Strong electron and spin correlations are studied in parallel-coupled double quantum dots with interdot spin superexchange $J$. In the Kondo regime with {\it}{degenerate} dot energy levels, a coherent transport occurs at zero temperature, where two entangled (bonding and antibonding) resonances are formed near the Fermi energy. When increasing $J$ or the dot-lead parallel-coupling \QTR{it}{asymmetry} ratio ${\Gamma }_2/{\Gamma }_1$, a swap between two entangled resonances occurs and the line shapes of the linear conductance are interchanged. The zero-bias differential conductance shows a peak at the critical values. Such a peculiar effect with the virtue of many-body coherence may be useful in future quantum computing.

4 pages, 4 figures

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Cited by in corpus (3)

• Fano Effect through Parallel-coupled Double Coulomb Islands
• The role of the indirect tunneling processes and asymmetry in couplings in orbital Kondo transport through double quantum dots
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots