基于腔QED的量子相干能量效应的研究  

Study of energy effect of quantum coherence based on cavity QED

作　　者：李海[1] 于文莉[2] 魏广芬[1] 华臻[1] LI Hai;YU Wen-li;WEI Guang-fen;HUA Zhen(School of Information and Electronic Engineering,Shandong Technology and Business Universiy?Yantai 264005,China;School of Computer Science and Technology,Shandong Technology and Business Universiy,Yantai264005,China)

机构地区：[1]山东工商学院信息与电子工程学院,山东烟台264005 [2]山东工商学院计算机科学与技术学院,山东烟台264005

出　　处：《光电子．激光》2019年第5期556-560,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金项目(11547036,61472227,61772319);山东省自然科学基金项目(ZR2011FL009,ZR2013AQ013)资助项目

摘　　要：基于微腔系统与大量二能级原子对组成的非平衡库相互作用的原子穿腔模型.研究了原子对携带的量子相干信息对腔场的能量贡献。推导了原子对处于一般态(所有密度矩阵元均为非零参数)下微腔动力学演化主方程,并计算了腔场的稳态能量。展示了能量本征基矢下库中原子对的量子相干扮演了热力学资源的角色——能够辅助微腔系统提取更多的能量。同时,分析了所有量子相干元(二能级原子对密度矩阵的非对角元)在能量贡献中的不同特征。本研究对设计高效率量子热机具有一定的参考价值。Based on the model of atoms crossing a microcavity where the microcavity interacts with a nonequilibrium bath consisting of a series of two-level atomic pairs,we investigate the energy contribution of quantum coherence in atomic pairs to the cavity field.We derive the master equation of cavity field evolution and provide the energy of cavity field at steady state when each independent two-level atomic pair is in the general state,i.e.,all the elements density matrix being nonzero parameters.We demonstrate that the quantum coherence in each aomic pairs of bath serving as the role of thermodynamic resource,i.e.,the quantum coherence could enhance the cavity′s energy extracted from the bath.Meanwhile,we also analyze the characteristics of all the quantum coherent elements(the nondiagonal elements of density matrix of two-level atomic pair) for the energy contributions to the cavity field.The paper could provide the reference for the design of quantum photon engine with high efficiency.

关 键 词：微腔 二能级原子对 量子相干 能量提取 

分 类 号：TN911[电子电信—通信与信息系统]