Transferring and bounding single photon in waveguide controlled by quantum node based on atomic ensemble

Single collective excitation of an atomic array trapped along a waveguide: a study of cooperative emission for different atomic chain configurations

Ordered atomic arrays trapped in the vicinity of nanoscale waveguides offer original light-matter interfaces, with applications to quantum information and quantum non-linear optics. Here, we study the decay dynamics of a single collective atomic excitation coupled to a waveguide in different configurations. The atoms are arranged as a linear array and only a segment of them is excited to a superradiant mode and emits light into the waveguide. Additional atomic chains placed on one or both sides play a passive role, either reflecting or absorbing this emission. We show that when varying the geo…

Arrays of strongly-coupled atoms in a one-dimensional waveguide

We study the cooperative optical coupling between regularly spaced atoms in a one-dimensional waveguide using decompositions to subradiant and superradiant collective excitation eigenmodes, direct numerical solutions, and analytical transfer-matrix methods. We illustrate how the spectrum of transmitted light through the waveguide including the emergence of narrow Fano resonances can be understood by the resonance features of the eigenmodes. We describe a method based on superradiant and subradiant modes to engineer the optical response of the waveguide and to store light. The stopping of light…

Coherent Quantum Transport in Photonic Lattices

Transferring quantum states efficiently between distant nodes of an information processing circuit is of paramount importance for scalable quantum computing. We report on the first observation of a perfect state transfer protocol on a lattice, thereby demonstrating the general concept of trans- porting arbitrary quantum information with high fidelity. Coherent transfer over 19 sites is realized by utilizing judiciously designed optical structures consisting of evanescently coupled waveguide ele- ments. We provide unequivocal evidence that such an approach is applicable in the quantum regime, f…

两个远距离超导人工原子之间的集体Floquet工程

Collective Floquet engineering between two distant superconducting artificial atoms

本研究通过对耦合带电容镜终端波导的两个超导量子比特应用Floquet工程，实现了对其光子介导相互作用的动态控制，可按需调控相干能级分裂与集体衰减，为远程量子发射器间相互作用的动态重塑提供了新途径。

利用纳米线中的布里渊相互作用实现光子存储器件

Memory Device for Photons by exploiting Brillouin Interactions in Nanowires

研究利用受激布里渊散射在纳米光纤中实现单光子级光存储，提出一种无增益损耗的慢光方案，通过光子-声子相互作用实现时间延迟存储。