项目名称: 考虑系统环境初始关联的量子反馈控制研究
项目编号: No.11274043
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 邹健
作者单位: 北京理工大学
项目金额: 78万元
中文摘要: 量子反馈控制是克服耗散和消相干的有效方法,对于量子信息处理的实际应用具有重要的意义。目前量子反馈控制方案基本上都是基于马尔科夫过程,都是假设系统与环境的初始状态是统计独立的。系统与环境初始不可避免地会有不同程度的关联,近几年研究发现系统与环境的初始关联对于系统动力学行为有非常大的影响。那么发展考虑系统与环境初始关联的非马尔科夫量子反馈控制理论是一个非常重要而且现实的研究课题,这方面的研究还没见有报道。本项目想在该领域做一些探索性的工作,主要研究当系统与环境存在初始关联时,不同测量方法,不同反馈哈密顿在量子反馈控制中所起的作用,针对不同系统期望找到最佳的反馈方案用于保护系统的相干特性,生成稳定的多粒子纠缠,控制系统的相干演化,以及加速系统量子态的纯化等。希望对于这一挑战性的课题的研究能够取得实质性的进展,这不仅具有重要的理论和科学价值,而且为实验以至于应用研究提供可靠的依据。
中文关键词: 系统环境初始关联;量子反馈控制;消相干;量子主方程;量子测量
英文摘要: Quantum feedback control is one of the effective methods to protect open quantum system from dissipation and decoherence, that is of great significance for the practical application of quantum information processing. At present almost all the quantum feedback control schemes are based on the Markovian process, and assume that system and bath are initially statistical independent. Recent results suggest that the inevitable initial correlations between system and its environment will strongly affect the dynamics of the system. Then it is very importannt and realistic to develop non-Markovian quantum feedback control schemes with initial system-bath correlations. In this project we want to do some exploratory research in this field. We will mainly focus on the effects of the initial system-bath correlations, the different measurement methods and the different feedback Hamiltonian on the quantum feedback control. The main aims of our project are to find the optimum quantum feedback control schemes to preserve system coherence, to produce stable multi-partite entanglement, to control the coherent evolution, and to increase the rate of quantum state purification. We hope that we can obtain some new results in this field. It not only has important theoretical and scientific values, but also provides reliable foundation
英文关键词: initial system-bath correlations;quantum feedback control;decoherence;quantum master equation;quantum measurement