Publication: Impact of electron-vibron interaction on the bound states in the continuum
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2015-06-12
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Elsevier
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Abstract
We investigate the nonequilibrium transport properties of a coupled quantum dot system connected in parallel to two leads, including electron-vibron interaction. It is known that in the absence of interaction the system supports a bound state in the continuum. This state is revealed as a Fano antiresonance in the transmission when the energy levels of the dots are detuned. Using the Keldysh nonequilibrium Green's function formalism, we find that the occurrence of the Fano antiresonance arises even if the electronvibration interaction is taken into account. We also examine the impact of the coupling to the leads in the linear response of the system. We conclude that the existence of bound states in the continuum in coupled quantum dot systems is a robust phenomenon, opening the possibility of its observation in experiments.
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© 2015 Elsevier B.V. All rights reserved.
Work at Madrid was supported by MINECO (projects MAT2010-17180 and MAT2013-46308). F Domínguez- Adame thanks the Theoretical Physics Group of the University of Warwick for the warm hospitality during the sabbatical leave. P Orellana acknowledges support from FONDECYT (grant 114057), DGIP/USM (internal grant 11.14.68) and CONICYT ACT 1204.
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