Centre for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia.
Proc Natl Acad Sci U S A. 2011 Aug 23;108(34):13969-72. doi: 10.1073/pnas.1109935108. Epub 2011 Aug 1.
Scaling down the size of computing circuits is about to reach the limitations imposed by the discrete atomic structure of matter. Reducing the power requirements and thereby dissipation of integrated circuits is also essential. New paradigms are needed to sustain the rate of progress that society has become used to. Single-atom transistors, SATs, cascaded in a circuit are proposed as a promising route that is compatible with existing technology. We demonstrate the use of quantum degrees of freedom to perform logic operations in a complementary-metal-oxide-semiconductor device. Each SAT performs multilevel logic by electrically addressing the electronic states of a dopant atom. A single electron transistor decodes the physical multivalued output into the conventional binary output. A robust scalable circuit of two concatenated full adders is reported, where by utilizing charge and quantum degrees of freedom, the functionality of the transistor is pushed far beyond that of a simple switch.
缩小计算电路的尺寸即将达到物质离散原子结构所施加的限制。降低集成电路的功耗和耗散也是至关重要的。需要新的范例来维持社会已经习惯的发展速度。提出级联的单原子晶体管 (SAT) 作为一种与现有技术兼容的有前途的途径。我们展示了利用量子自由度在互补金属氧化物半导体器件中执行逻辑运算。每个 SAT 通过电寻址掺杂原子的电子态来执行多级逻辑。单个电子晶体管将物理多值输出解码为传统的二进制输出。报道了一个由两个级联的全加器组成的稳健可扩展电路，通过利用电荷和量子自由度，晶体管的功能远远超出了简单开关的功能。
