Quantum Optoelectronics Laboratory, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
J Phys Condens Matter. 2010 May 12;22(18):185301. doi: 10.1088/0953-8984/22/18/185301. Epub 2010 Apr 15.
Quantum coherent transport through open mesoscopic Aharonov-Bohm rings (driven by static fluxes) have been studied extensively. Here, by using quantum waveguide theory and the Floquet theorem we investigate the quantum transport of electrons along an open mesoscopic ring threaded by a time-periodic magnetic flux. We predicate that current density waves could be excited along such an open ring. As a consequence, a net current could be generated along the lead with only one reservoir, if the lead additionally connects to such a normal-metal loop driven by the time-dependent flux. These phenomena could be explained by photon-assisted processes, due to the interaction between the transported electrons and the applied oscillating external fields. We also discuss how the time-average currents (along the ring and the lead) depend on the amplitude and frequency of the applied oscillating fluxes.
通过开放介观阿哈罗诺夫-玻姆环（由静态通量驱动）的量子相干输运已经得到了广泛的研究。在这里，我们利用量子波导理论和弗洛凯定理研究了沿周期性磁通量的开放介观环中电子的量子输运。我们预测，电流密度波可以沿这种开环激发。因此，如果导体制冷器另外连接到由时间相关的磁通驱动的这种正常金属环，则可以在只有一个储层的情况下沿导体制冷器产生净电流。这些现象可以通过光子辅助过程来解释，这是由于输运电子与外加振荡外场之间的相互作用。我们还讨论了时间平均电流（沿环和导体制冷器）如何依赖于施加的振荡通量的幅度和频率。
