Transport through several four-quantum-dot topological structures

被引：1
|
作者：
Zhi, Qingshuang [1 ]
Chen, Kongfa [2 ]
He, Zelong [1 ]
机构：
[1] Yangtze Normal Univ, Sch Elect & Informat Engn, Chongqing 408003, Peoples R China
[2] Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2021年 / 35卷 / 23期
基金：
中国国家自然科学基金;
关键词：
Quantum dot; quantum switch; spin-filtering; Green's function; QUANTUM DOTS; SYSTEM;
D O I：
10.1142/S0217984921503930
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, several four-quantum-dot topological structures are designed. The influence of the interdot coupling strength and intradot Coulomb interactions on the conductance is discussed. The location of the anti-resonance band can be manipulated by tuning the interdot coupling strength, which suggests a physical scheme of an effective quantum switch. The Fano anti-resonance peak may evolve into a resonance peak. For the particular value of the interdot coupling strength, two Fano anti-resonances collapse and bound states in the continuum are formed. Moreover, many-body effect makes the number of anti-resonance bands increase. This study provides a theoretical basis for the design of quantum computing devices.
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页数：10
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