【作者】 马蕴超；

【导师】 叶柳；

【作者基本信息】 安徽大学 ， 光学， 2005， 硕士

【摘要】 量子信息学是二十世纪八十年代发展起来的,由量子力学和信息科学相结合而形成的一门新兴学科,主要包括量子通信和量子计算两个方面。由于量子信息潜在的应用价值(例如:可能给现有的信息产业带来划时代的革命)和重大的科学意义,正引起各方面越来越多的关注。 在量子信息学中,纠缠态是其最基本的要素,而以它为基础的一些研究方向如量子隐形传态,纠缠态的制备等也决定着量子信息网络能否最终实现。到目前为止,以上课题都取得了重要的突破但随着量子信息学往更深层次的发展,如何更加准确,更加节省资源的制备和传输纠缠态也逐渐成了量子信息学中急需解决的一个问题,所以在本论文中,主要将探索一种新的纠缠态制备方案:远程态制备。本文主要内容为: 1.提出了用三对最大的和非最大两粒子纠缠态作为量子通道远程制备一个三粒子纠缠态,此方案的优点在于其节省了更多的经典资源。 2.利用腔QED技术,提出了远程制备一个单原子态和一个两原子纠缠态。其优点在于,此方案只需要一个经典比特和一次测量,减少了操作步骤和资源。更多还原

【Abstract】 Quantum Information is a new subject combined with Quantum Mechanics and Information Science. For its great applied potential in many fields, Quantum Information has received more and more attention.Entangled state plays a most essential role in Quantum Information. What’s more, quantum teleportation and remote state preparation which are based on the entangled state determine the realization of Quantum Information Web. Although all these mentioned subjects have gained breakthrough, the pressing problem that how we can prepare remote state with a more accurate and saving way calls for solvability.This dissertation mainly includes the following works:1 Introduce the generation of three particles entangled state which uses three pairs maximally entangled state and nonmaximally entangled state. The advantage of this scheme is that it can save more classical resource.2 Based on the cavity QED techniques, we proposed a faithful scheme to prepare remote state of a single-atom state and a two-atom entangled state. This scheme has an exciting merit that only one classical bit and one single-atom state measurement is needed for the remote state preparation of multi-atom entangled state.更多还原