Asymmetric-coupled vertical quantum dots (ACVQD) - Towards Light controlled quantum gate

非对称耦合垂直量子点（ACVQD）——迈向光控量子门

• 批准号: 21685618
• 负责人: Dr. Michael Jetter
• 金额: --
• 依托单位: Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/21685618?language=en
• 关键词: Asymmetric; coupled; vertical; quantum; dots

In this project we propose the realization of a laterally and vertically positioned triple dot structure consisting of an asymmetric double dot structure (ADQD) and a single dot (larger than the ADQD). The triple dot structure serves as a quantum gate with the ADQD as source dot and the large dot as target dot. The coupling between source and target is achieved by light induced dipole fields originating from the ADQD already observed in asymmetric double quantum wells (ADQW) [1]. With respect to the state of the art proposals [2] where static fields are applied to get the function of a quantum gate here optical addressing via light induced Stark effect also observed in quantum wells (QW) and in quantum well wires (QWW) [1] is proposed to extend the state of the art. To obtain the function both the vertical and the lateral position and size of the triple dot structure must be controlled in the nanometer range.

在这个项目中，我们提出了实现一个横向和垂直定位的三点结构，包括一个不对称的双点结构（ADQD）和一个单点（大于ADQD）。三点结构作为一个量子门，其中ADQD作为源点，大点作为目标点。源和目标之间的耦合通过源自已在非对称双量子威尔斯阱（ADQW）[1]中观察到的ADQD的光致偶极场来实现。相对于现有技术的提议[2]，其中施加静态场以获得量子门的功能，在此经由光诱导斯塔克效应的光学寻址也在量子威尔斯（QW）和量子阱线（QWW）中观察到[1]。为了获得该功能，必须控制三点结构的垂直和横向位置和尺寸在纳米范围内。