Transport properties in a non-Hermitian triple-quantum-dot structure

Transport properties in a non-Hermitian triple-quantum-dot structure In this paper, we study the effect of PT-symmetric complex potentials on the transport properties of one non-Hermitian system, which is formed by the coupling between a triple-quantum-dot molecule and two semi-infinite leads. As a result, it is found that the PT-symmetric imaginary potentials have pronounced effects on the transport properties of such a system, including changes from antiresonance to resonance, shift of antiresonance, and occurrence of new antiresonance, which are determined by the interdot and dot-lead coupling manners. This paper can be helpful in understanding the quantum transport behaviors modified by the PT symmetry in non-Hermitian discrete systems. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

Transport properties in a non-Hermitian triple-quantum-dot structure

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Transport properties in a non-Hermitian triple-quantum-dot structure

Abstract

In this paper, we study the effect of PT-symmetric complex potentials on the transport properties of one non-Hermitian system, which is formed by the coupling between a triple-quantum-dot molecule and two semi-infinite leads. As a result, it is found that the PT-symmetric imaginary potentials have pronounced effects on the transport properties of such a system, including changes from antiresonance to resonance, shift of antiresonance, and occurrence of new antiresonance, which are determined by the interdot and dot-lead coupling manners. This paper can be helpful in understanding the quantum transport behaviors modified by the PT symmetry in non-Hermitian discrete systems.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1050-2947
eISSN
1094-1622
D.O.I.
10.1103/PhysRevA.95.062123
Publisher site
See Article on Publisher Site

Abstract

In this paper, we study the effect of PT-symmetric complex potentials on the transport properties of one non-Hermitian system, which is formed by the coupling between a triple-quantum-dot molecule and two semi-infinite leads. As a result, it is found that the PT-symmetric imaginary potentials have pronounced effects on the transport properties of such a system, including changes from antiresonance to resonance, shift of antiresonance, and occurrence of new antiresonance, which are determined by the interdot and dot-lead coupling manners. This paper can be helpful in understanding the quantum transport behaviors modified by the PT symmetry in non-Hermitian discrete systems.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Jun 28, 2017

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