<p>We present the formation of Andreev bound states in the continuum (ABIC) in the parallel double quantum dot structure with side-coupled superconductors. By means of the nonequilibirum Green’s function technique, relevant observables are analyzed, such as the differential conductance and the density of states. The interesting results are that true ABICs come into being for the case of symmetric configuration, independent of the application manners of the bias voltage. Furthermore, when superconducting phase difference is incorporated, the ABIC is allowed to transform into the Fano antiresonance, which depends on both the superconducting phase difference and the application manners of bias voltage. We believe that these results can be helpful for realizing the ABIC and its manipulation in the normal-superconducting hybridized systems.</p>

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Andreev bound states in the continuum in the parallel double quantum dot structure due to the superconducting proximity effect

  • Zong-Gang Xu,
  • Feng-Rong Shi

摘要

We present the formation of Andreev bound states in the continuum (ABIC) in the parallel double quantum dot structure with side-coupled superconductors. By means of the nonequilibirum Green’s function technique, relevant observables are analyzed, such as the differential conductance and the density of states. The interesting results are that true ABICs come into being for the case of symmetric configuration, independent of the application manners of the bias voltage. Furthermore, when superconducting phase difference is incorporated, the ABIC is allowed to transform into the Fano antiresonance, which depends on both the superconducting phase difference and the application manners of bias voltage. We believe that these results can be helpful for realizing the ABIC and its manipulation in the normal-superconducting hybridized systems.