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Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer
We investigate quantum interference effects in a double-Aharonov-Bohm (AB) interferometer consisting of five quantum dots sandwiched between two metallic electrodes in the case of symmetric dot-electrode couplings by the use of the Green’s function equation of motion method. The analytical expressio...
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Formato: | Texto |
Lenguaje: | English |
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Springer
2010
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894244/ https://www.ncbi.nlm.nih.gov/pubmed/20596314 http://dx.doi.org/10.1007/s11671-010-9631-0 |
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author | Yang, XF Liu, YS |
author_facet | Yang, XF Liu, YS |
author_sort | Yang, XF |
collection | PubMed |
description | We investigate quantum interference effects in a double-Aharonov-Bohm (AB) interferometer consisting of five quantum dots sandwiched between two metallic electrodes in the case of symmetric dot-electrode couplings by the use of the Green’s function equation of motion method. The analytical expression for the linear conductance at zero temperature is derived to interpret numerical results. A three-peak structure in the linear conductance spectrum may evolve into a double-peak structure, and two Fano dips (zero conductance points) may appear in the quantum system when the energy levels of quantum dots in arms are not aligned with one another. The AB oscillation for the magnetic flux threading the double-AB interferometer is also investigated in this paper. Our results show the period of AB oscillation can be converted from 2π to π by controlling the difference of the magnetic fluxes threading the two quantum rings. |
format | Text |
id | pubmed-2894244 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-28942442010-06-30 Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer Yang, XF Liu, YS Nanoscale Res Lett Nano Ideas We investigate quantum interference effects in a double-Aharonov-Bohm (AB) interferometer consisting of five quantum dots sandwiched between two metallic electrodes in the case of symmetric dot-electrode couplings by the use of the Green’s function equation of motion method. The analytical expression for the linear conductance at zero temperature is derived to interpret numerical results. A three-peak structure in the linear conductance spectrum may evolve into a double-peak structure, and two Fano dips (zero conductance points) may appear in the quantum system when the energy levels of quantum dots in arms are not aligned with one another. The AB oscillation for the magnetic flux threading the double-AB interferometer is also investigated in this paper. Our results show the period of AB oscillation can be converted from 2π to π by controlling the difference of the magnetic fluxes threading the two quantum rings. Springer 2010-05-22 /pmc/articles/PMC2894244/ /pubmed/20596314 http://dx.doi.org/10.1007/s11671-010-9631-0 Text en Copyright © 2010 The Author(s) https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Nano Ideas Yang, XF Liu, YS Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title | Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title_full | Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title_fullStr | Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title_full_unstemmed | Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title_short | Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer |
title_sort | multiple-path quantum interference effects in a double-aharonov-bohm interferometer |
topic | Nano Ideas |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894244/ https://www.ncbi.nlm.nih.gov/pubmed/20596314 http://dx.doi.org/10.1007/s11671-010-9631-0 |
work_keys_str_mv | AT yangxf multiplepathquantuminterferenceeffectsinadoubleaharonovbohminterferometer AT liuys multiplepathquantuminterferenceeffectsinadoubleaharonovbohminterferometer |