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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
在弱合的双量子点系统中,通过保利排除进行电流纠正.
1Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
概括
由保利排除引起的合量子点中的自旋阻塞导致电流纠正. 应用磁场可以通过启用旋转三重通道来打破这种阻塞.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子计算是一种量子计算.
- 这就是Spintronics.
背景情况:
- 保利排除原理控制了量子系统中的电子行为.
- 偶联的量子点是量子信息处理的基本组成部分.
- 旋转阻塞是一种影响量子点中电子运输的现象.
研究的目的:
- 为了研究合量子点系统中的自旋阻塞.
- 了解导致当前纠正的条件.
- 探索使用磁场控制旋转阻塞的方法.
主要方法:
- 结合量子点系统的制造和表征.
- 在不同偏差条件下测量道特征.
- 应用外部磁场来探测自旋状态.
主要成果:
- 由于保利排除,观察到自旋阻塞,当两个相同自旋的电子占据最低能量的状态时.
- 由不对称的电子群体和自旋阻塞引起的证明电流纠正.
- 显示了在磁场下旋转阻塞的崩,使得一个旋转三倍电流运输通道成为可能.
结论:
- 合量子点中的自旋阻塞对电子自旋和群体不对称性敏感.
- 电流纠正可以通过控制的旋转阻塞来实现.
- 磁场提供了一种可行的方法来操纵旋转状态并克服旋转阻塞以提高运输.
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