arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.3663quant-ph
收藏

扩展原子系综中亚辐射态的量子存储

Quantum storage on subradiant states in an extended atomic ensemble

Alexey Kalachev

摘要:

发展了一种对原子集体态进行相干操纵的方案,使得在扩展的原子系综中产生总的次辐射态,在该次辐射态中,由于相邻原子之间的相消干涉,自发发射被抑制到各个方向。讨论了产生这种态的最佳条件及其对量子存储的适用性。结果表明,为了获得最大的信噪比,利用原子系统的均匀展宽吸收线存储和重构的光脉冲的形状应是系统响应函数的时间反演正则部分。在高光密度的限制下,这样的脉冲允许人们准备集体亚辐射原子态,其在介质中的原子激发的空间分布接近平坦。

英文摘要:

A scheme for coherent manipulation of collective atomic states is developed such that total subradiant states, in which spontaneous emission is suppressed into all directions due to destructive interference between neighbor atoms, can be created in an extended atomic ensemble. The optimal conditions for creation of such states and suitability of them for quantum storage are discussed. It is shown that in order to achieve the maximum signal-to-noise ratio the shape of a light pulse to be stored and reconstructed using a homogeneously broadened absorbtion line of an atomic system should be a time-reversed regular part of the response function of the system. In the limit of high optical density, such pulses allow one to prepare collective subradiant atomic states with near flat spatial distribution of the atomic excitation in the medium.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑