Characterization and control of multipartite quantum systems for information processing

用于信息处理的多部分量子系统的表征和控制

• 批准号: 327511-2011
• 负责人: Ghose, Shohini
• 金额: $ 2.7万
• 依托单位: Wilfrid Laurier University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572039
• 关键词: Characterization; control; multipartite; quantum; systems

Information processing based on the laws of quantum mechanics offers the promise of revolutionary advances in computing and communication. Quantum algorithms can perform certain tasks dramatically faster than today's fastest computers, and novel protocols such as teleportation and quantum cryptography can transform our current communication and information processing capabilities. Small-scale quantum information processing (QIP) has been demonstrated, but the challenge is to efficiently control multipartite coupled systems for large-scale QIP. These coupled systems can exhibit powerful non-classical correlations or 'entanglement' in the quantum regime, and nonlinear chaotic behaviour in the classical regime. In this research program, my goals are to characterize and analyze quantum interactions in multipartite systems, design and evaluate efficient quantum control techniques, and develop new quantum information processing protocols. This work builds on my ongoing successful research program in quantum information and quantum chaos and will focus on two areas. First, we will analyze the control of realistic quantum systems and explore how chaos affects information processing and the behaviour of valuable quantum resources such as entanglement. We intend to study noise and error correction in the presence of chaos, and the use of feedback control for QIP, which is still relatively unexplored. Second, we will perform detailed characterizations of multipartite quantum correlations and develop efficient, large-scale QIP protocols by exploiting these correlations. Our optimal communication schemes based on tripartite entanglement will be generalized to multiparty networks. The research will involve analytical and numerical techniques, and will analyze realistic physical systems in order to develop a framework of quantum control that can be usefully implemented. This exciting research will lead to new insight into long-debated questions about the quantum-classical connection as well as help to develop a powerful control toolbox for building robust quantum technologies. The program will train highly qualified personnel and enhance Canada's world-class reputation in QIP research.

基于量子力学定律的信息处理为计算和通信领域的革命性进步带来了希望。量子算法可以比当今最快的计算机更快地执行某些任务，而隐形传态和量子密码学等新颖协议可以改变我们当前的通信和信息处理能力。小规模量子信息处理（QIP）已经被证明，但挑战是如何有效控制大规模 QIP 的多部分耦合系统。这些耦合系统可以在量子体系中表现出强大的非经典相关性或“纠缠”，在经典体系中表现出非线性混沌行为。 在这个研究项目中，我的目标是表征和分析多部分系统中的量子相互作用，设计和评估有效的量子控制技术，并开发新的量子信息处理协议。这项工作建立在我正在进行的量子信息和量子混沌方面的成功研究计划的基础上，并将重点关注两个领域。首先，我们将分析现实量子系统的控制，并探讨混沌如何影响信息处理以及纠缠等有价值的量子资源的行为。我们打算研究存在混沌的情况下的噪声和纠错，以及 QIP 反馈控制的使用，这仍然是相对未经探索的。其次，我们将详细描述多部分量子相关性，并利用这些相关性开发高效、大规模的 QIP 协议。我们基于三方纠缠的最优通信方案将推广到多方网络。该研究将涉及分析和数值技术，并将分析现实的物理系统，以开发一个可以有效实施的量子控制框架。 这项令人兴奋的研究将为有关量子经典联系的长期争论问题提供新的见解，并有助于开发强大的控制工具箱来构建强大的量子技术。该项目将培养高素质人才，提升加拿大在 QIP 研究领域的世界级声誉。