Detection and manipulation of quantum coherence in quantum dots and wires

精确控制单个电子的量子力学性质可以提供固态量子物理的新概念以及在信息处理中的应用。我们利用半导体量子点和量子线进行了基础物理的实验研究。我们已经实现了量子点中单电子自旋的量子比特和逻辑门，自旋效应包括超导效应的电控制，以及电子波在量子线中传播的电控制。这些都是与上述新概念有关的首次实验演示。这些研究将极大地促进量子相干控制的科学和技术。

Precise control of quantum mechanical properties of individual electrons may offer new concepts of solid-sate quantum physics as well as applications to information processing. We have used semiconductor quantum dots and quantum wires to experimentally study the fundamental physics. We have realized quantum bits and logic gates with single electron spins in quantum dots, electrical control of the spin effect including superconducting effect, and electrical control of electron wave propagating in quantum wires. These are all first experimental demonstrations linked to the new concepts described above. These studies will largely promote science and technology of quantum coherence control.