Swapping Kondo resonances in coupled double quantum dots

Guang-Ming Zhang, Rong Lü, Zhi-Rong Liu, and Lu Yu
Phys. Rev. B 72, 073308 – Published 19 August 2005

Abstract

Strong electron and spin correlations are studied in parallel-coupled double quantum dots with interdot spin superexchange J. In the Kondo regime with degenerate dot energy levels, 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 asymmetry ratio Γ2Γ1, a swap between two entangled resonances occurs and the line shapes of the transmission are interchanged. The linear 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.

    • Received 3 March 2005

    DOI:https://doi.org/10.1103/PhysRevB.72.073308

    ©2005 American Physical Society

    Authors & Affiliations

    Guang-Ming Zhang1,2, Rong Lü2, Zhi-Rong Liu1, and Lu Yu3,2

    • 1Department of Physics, Tsinghua University, Beijing 100084, China
    • 2Center for Advanced Study, Tsinghua University, Beijing 100084, China
    • 3Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, CAS, Beijing 100080, China

    Article Text (Subscription Required)

    Click to Expand

    References (Subscription Required)

    Click to Expand
    Issue

    Vol. 72, Iss. 7 — 15 August 2005

    Reuse & Permissions
    Access Options
    Author publication services for translation and copyediting assistance advertisement

    Authorization Required


    ×
    ×

    Images

    ×

    Sign up to receive regular email alerts from Physical Review B

    Log In

    Cancel
    ×

    Search


    Article Lookup

    Paste a citation or DOI

    Enter a citation
    ×