耗散体系中关于制备多体纠缠态的研究

项目名称： 耗散体系中关于制备多体纠缠态的研究

项目编号： No.11204028

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 邵晓强

作者单位： 东北师范大学

项目金额： 25万元

中文摘要： 量子计算机是以量子力学作为理论基础，运用叠加和纠缠等属性进行信息处理的装置。而量子纠缠现象作为量子理论最重要的特性之一，则是量子信息处理中必不可少的重要资源。但是退相干的存在使得以忠实并可靠的方式制备高保真度的纠缠态成为实验量子信息学领域中的一个主要挑战。因为量子体系不可避免地会与其周围环境发生相互作用，从而导致量子体系的信息流失。因此传统上认为，噪音在量子信息处理中只是起到破坏的作用。然而最近的理论以及实验的进展说明环境可以作为一个重要的资源。系统与环境的耦合会将系统驱使到一个稳态，而这个稳态恰好是我们计算所需的量子态。因此本项目主要在腔量子电动力学的框架下，研究如何利用体系固有的耗散特性来制备稳定的多体纠缠态。进而设计与纠缠相关的量子克隆机。

中文关键词： 耗散系统；多体纠缠；量子反馈；腔量子电动力学；

英文摘要： A quantum computer is a device for computation that makes use of superposition and entanglement in quantum mechanics to perform operations on data. As one of most important feature in quantum theory, quantum entanglement is the essential resource for quantum information processing. However, the presence of decoherence make it an obstacle to prepare faithful and reliable entanglement states in experiment for quantum information science. Since a quantum system will inevitably interact with its surroundings which leads to the loss of information for the quantum system. Traditionally, it has been assumed that noise can only have detrimental effects in quantum information processing.Nevertheless, it has been suggested, and realized experimentally, that the environment can be used as a resource. The coupling to the environment drives the system to a steady state where the outcome of the computation is encoded. Therefore, we aim to instigate the generation of multipartite entantlement states with dissipation in the context of cavity quanutm electrodynamics, and further design related quantum cloning machines.

英文关键词： dissipative system；multipartite entanglement；quantum feedback；cavity QED；