Antiresonances modulated by magnetic flux in an Aharonov-Bohm ring

被引：3

作者：

Chen, H ^{[1
]}

Shi, YM

机构：

[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[2] Shanghai Univ, Dept Phys, Shanghai 200072, Peoples R China

来源：

PHYSICS LETTERS A | 1999年 / 262卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/S0375-9601(99)00641-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With or without an inserted quantum dot or an attached side resonator, the transmission behavior of an Aharonov-Bohm (AB) ring Is investigated in the framework of quantum waveguide theory in the complex-energy plane. The calculated results show that the AB ring possesses antiresonances in the conductance and several kinds of transmission poles in the complex-energy plane. Piercing the ring, magnetic flux causes a series of crossovers among zero-pole pairs. zero-double-pole pairs, peak-double-pole pairs, and peak-pole pairs. With the inserted quantum dot or attached side resonator in one of its arms, the ring produces complicated behaviors in conductance: some of the poles are split into more than two parts. A kind of deformed Fano resonance is found in the conductance of the AB ring with the attached resonator. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：76 / 82

页数：7

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