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    • 4. 发明授权
    • Three dot computing elements
    • 三个点计算元素
    • US5530263A
    • 1996-06-25
    • US291306
    • 1994-08-16
    • David P. DiVincenzo
    • David P. DiVincenzo
    • G11C11/21G02F3/00G06N99/00G11C11/16H01L29/06H01L29/12H01L29/66H01L43/00H01L49/02H03K3/02H03K17/51H01L29/18H01L31/0328H01L31/0336
    • G06N99/002B82Y10/00G11C11/16H01L29/127H03K17/51H03K3/02G11C2216/08
    • There is provided by this invention logic and memory elements of atomic or near-atomic scale useful in computer central processing units. These elements consist of two quantum dots having opposite states and a third quantum dot situated between the two quantum dots and in physical contact with them. The third quantam dot is of a material which makes the opposite states of the first two quantum dots energetically favorable. In particular, there is provided by the invention a spin flip-flop suitable for use as electronic logic and memory in a quantum computer. The spin flip-flop is designed to have two highly stable states, encoded entirely in the arrangement of electronic spins in the structure. Switching between the two states is accomplished by fast electromagnetic pulsing generally and by optical pulsing in the case of the spin flip-flop. The two stable states are the up-down and the down-up spin states of two single electrons placed into two neighboring electronic quantum dots typically by doping or by a field effect. The operation of the device is facilitated and stabilized by the presence of a small particle or dot of an antiferromagnetic material placed between the two electronic dots, and in physical contact with both of them.
    • 本发明提供了用于计算机中央处理单元的原子或近原子尺度的逻辑和存储元件。 这些元件由具有相反状态的两个量子点和位于两个量子点之间并与它们物理接触的第三量子点组成。 第三量子点是使前两个量子点的相反状态在能量上有利的材料。 特别地,本发明提供了适用于量子计算机中的电子逻辑和存储器的自旋触发器。 自旋触发器设计为具有两个高度稳定的状态,完全编码在结构中的电子自旋的布置中。 两种状态之间的切换通常通过快速电磁脉冲和在自旋触发器的情况下通过光脉冲来实现。 两个稳定状态是通常通过掺杂或通过场效应将两个单个电子放置在两个相邻的电子量子点中的向上和向下自旋状态。 通过存在放置在两个电子点之间的反铁磁材料的小颗粒或点,并且与它们两者物理接触,促进和稳定器件的操作。