Li Qili, Li Xiaoxia, Miao Bingfeng, Sun Liang, Chen Gong, Han Ping, Ding Haifeng
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, China.
Collaborative Innovation Center of Advanced Microstructures, 210093, Nanjing, China.
Nat Commun. 2020 Mar 16;11(1):1400. doi: 10.1038/s41467-020-15137-8.
The quantum mirage effect is a fascinating phenomenon in fundamental physics. Landmark experiments on quantum mirages reveal atomic-scale transport of information with potential to remotely probe atoms or molecules with minimal perturbation. Previous experimental investigations are Kondo-effect based; the quantum mirages appear only near the Fermi energy. This strongly limits the exploration of the mechanism and potential application. Here we demonstrate a Kondo-free quantum mirage that operates in a wide energy range beyond Fermi energy. Together with an analytical model, our systematic investigations identify that the quantum mirage is the result of quantum interference of the onsite electronic states with those scattered by the adatom at the focus of elliptical quantum corrals, where two kinds of scattering paths are of critical importance. Moreover, we also demonstrate the manipulation of quantum mirages with pseudo basic logic operations, such as NOT, FANOUT and OR gates.
量子海市蜃楼效应是基础物理学中一种引人入胜的现象。关于量子海市蜃楼的标志性实验揭示了原子尺度的信息传输，具有以最小扰动远程探测原子或分子的潜力。先前的实验研究基于近藤效应；量子海市蜃楼仅出现在费米能量附近。这极大地限制了对其机制和潜在应用的探索。在此，我们展示了一种无近藤效应的量子海市蜃楼，它在费米能量之外的宽能量范围内起作用。结合一个分析模型，我们的系统研究确定，量子海市蜃楼是椭圆量子围栏焦点处的局域电子态与被吸附原子散射的电子态之间量子干涉的结果，其中两种散射路径至关重要。此外，我们还展示了用诸如非门、扇出门和或门等伪基本逻辑运算对量子海市蜃楼进行操纵。
