在半导体中光学注入电子的旋转状态断层扫描
Hideo Kosaka1, Takahiro Inagaki, Yoshiaki Rikitake
1Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan. kosaka@riec.tohoku.ac.jp
Nature
|February 6, 2009
概括
我们开发了断层Kerr旋转,这是一种直接测量电子自旋相干性的新方法. 这种技术使自旋状态断层扫描能够用于先进的量子信息技术应用.
科学领域:
- 量子信息科学 量子信息科学
- 凝聚物质物理学 凝聚物质物理学
- 光学和光子学 在光学和光子学.
背景情况:
- 电子自旋对于量子信息技术至关重要,需要连贯的准备和读出.
- 传统的克尔旋转测量旋转群,但需要额外的步骤来推断旋转连贯性.
研究的目的:
- 开发一种直接测量电子自旋相干性的技术.
- 为了使自旋投影测量能够在任意基础上进行测量,状态.
- 为了实现自旋量子状态的基础独立准备和读取.
主要方法:
- 概括传统的克尔旋转方法.
- 利用光极化连贯性转移到电子自旋连贯性.
- 在半导体量子井中应用断层Kerr旋转方法.
主要成果:
- 在没有旋转操纵的情况下,证明了电子自旋连贯性的直接测量.
- 展示了从光向电子旋转转移的极化连贯性.
- 证实了该技术在量子井中对预处理和非预处理电子的有效性.
结论:
- 断层Kerr旋转使得电子自旋连贯性的直接,基础独立测量成为可能.
- 这种技术为量子信息应用提供了自旋状态断层扫描.
- 提供了一种用于固态系统中自旋量子状态准备和读取的新工具.
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