Majorana fermions induced fast-and slow-light in a hybrid semiconducting nanowire/superconductor device

We investigate theoretically Rabi-like splitting and Fano resonance in absorption spectra of quantum dots(QDs)based on a hybrid QD-semiconducting nanowire/superconductor(SNW/SC)device mediated by Majorana fermions(MFs).Under the condition of pump on-resonance and off-resonance,the absorption spectrum experiences the conversion from Fano resonance to Rabi-like splitting in different parametric regimes.In addition,the Fano resonances are accompanied by the rapid normal phase dispersion,which will indicate the coherent optical propagation.The results indicate that the group velocity index is tunable with controlling the interaction between the QD and MFs,which can reach the conversion between the fast-and slow-light.Fano resonance will be another method to detect MFs and our research may indicate prospective applications in quantum information processing based on the hybrid QD-SNW/SC devices.     

基于磁光力系统的相干光学传输特性研究

提出了一个包含磁振子-声子-光子三者相互作用的磁光力系统,该系统由一个磁振子(钇铁石榴石小球)和一个光学谐振腔构成.在该系统中,利用大量自旋的亚铁磁体的集体运动来表征磁振子,并且磁振子和光子通过磁偶极子相互作用耦合,磁振子和声子通过磁致伸缩相互作用耦合.利用严格的量子光学理论与输入-输出关系理论,研究了该系统中的相干光学传输特性.通过调控该系统中的参数,实现了对输出场的有效调控,为宏观量子现象的研究提供了一个有前景的平台.