相干光驱动的超冷原子系综中光子流的动态量子调控

项目名称： 相干光驱动的超冷原子系综中光子流的动态量子调控

项目编号： No.11247005

项目类型： 专项基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 张岩

作者单位： 东北师范大学

项目金额： 20万元

中文摘要： 本项目旨在前期工作基础之上，对相干光驱动的超冷原子中光子的动态量子调控问题进行更深入的研究。利用电磁感应透明（EIT）现象，进一步拓展对在超冷原子系综中实现全光控制的光子带隙（PBG）和动态生成的静态光脉冲（SLP）等光子调控技术的研究，从而实现更为灵活多样的光量子调控。从传统的单信道SLP拓展到双信道SLP，然后分别对静态与动态的光脉冲之间或两对SLP之间的克尔非线性效应进行研究，从而实现受控相位门。突破原有PBG的频率区域要与耦合激光频率相当的限制，以可见激光耦合的里德堡原子系综为介质，利用里德堡能级寿命较长的特点，努力实现能对紫外光子进行有效控制的PBG技术，并特别考虑偶极封锁效应产生的影响。进一步将超冷原子系综放于微腔的环境中，从半经典理论向全量子理论过渡，研究在单光子水平的SLP和PBG技术，从而提供基础量子逻辑门和量子纠缠态的实现方案。

中文关键词： 电磁感应透明；光子带隙；静态光脉冲；量子调控；

英文摘要： Based on the my previous work，this project is aimed at the further research on dynamical quantum manipulation of photons in cold atomic ensembles driven by coherent light fields. Using electromagnetically induced transparency (EIT), we extend the study on photon control technologies such as all-optically controlled photonic bandgaps (PBGs) and dynamically generated stationary light pulses (SLPs) so that more flexible quantum manipulation of photons is viable to achieve. For instance, our study will be expanded from the single-channel SLP to dual-channel SLPs. In this case, a greatly enhanced Kerr nonlinear effect can be attained between stationary and slowly-moving pulses, which may be explored to achieve controlled phase gates. Besides, breaking through the restriction that the frequency region of a PBG is always near the frequency of coupling lasers, we will investigate how to establish the ultraviolet PBGs with the visible light fields in cold Rydberg atoms, and consider in particular the dipole blockade effect. We will also try to realize the transition from semi-classical theory to full quantum theory by considering the case where cold atoms are placed in an optical cavity. This allows us to study the PBG and SLP technologies at the single-photon level and devise a few efficient schemes of quantum logic gat

英文关键词： electromagnetically induced transparency；photonic bandgap；stationary light pulse；quantum manipulation；