Quantum information processing with electron spins/ informatique quantique avec le spin des électrons

利用电子自旋进行量子信息处理/ informatique quantique avec le spin des électrons

• 批准号: 371412-2009
• 负责人: PioroLadrière, Michel
• 金额: $ 3.21万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=461190
• 关键词: Quantum; information; processing; electron; spins

The rapidity at which a computer processes information is due to the facility to manipulate electric charges. The elemental carrier of the electric charge, the electron, also performs an action that could very well revolutionize the information technologies. Because of an intrinsic angular momentum, it is as if the electron turns, or spins, on itself. This property, known since the beginning of quantum mechanics, has been harnessed only recently. By measuring the rotation around a given axis, an observer will always obtain one of the two following results: either the electron spins at a certain speed clockwise, or the electron spins at the same speed anti-clockwise. These two states can be used to encode one bit of information at a very small physical scale: the size of the electron itself. Furthermore, using magnetic fields, it is possible to excite the electron to a state where it turns in both directions simultaneously, effectively implementing a quantum logical operation.

计算机处理信息的速度之快是由于它具有操纵电荷的功能。电荷的基本载体，电子，也执行了一个很可能彻底改变信息技术的行为。由于固有的角动量，电子就好像在自己旋转。这种性质在量子力学诞生之初就已为人所知，但直到最近才得到利用。通过测量绕给定轴的旋转，观察者总是会得到以下两个结果之一：电子以一定的速度顺时针旋转，或者电子以相同的速度逆时针旋转。这两种状态可以用来在非常小的物理尺度上编码一位信息：电子本身的大小。此外，使用磁场，可以将电子激发到同时在两个方向上转动的状态，有效地实现量子逻辑运算。