Altering the Course of Quantum Dynamics Phenomena

普林斯顿大学的Herschel A.Rabitz教授得到了化学理论、模型和计算方法计划的支持，以开发量子控制的新理论概念。对量子现象的控制需要通过引入外场来干预动力学事件的正常演化。非常令人惊讶的是，在模拟和实验室中，为这一目的找到最佳油田都比预期的要容易得多。普林斯顿大学一直在努力从根本上理解这种行为的起源。特别是，在最基本的层面上，需要理解控制景观的结构，其中，控制景观是作为控制的函数的物理可观察性。将使用一系列理论和计算分析工具来分析这些景观，目的是最终为确定控制量子现象的基本规则提供见解。这一努力的一部分将包括揭示实现控制的机制以及一般哈密顿结构在促进控制方面的作用。这项研究的结果有望加深对受控量子现象的理解，并为该领域有希望的实验方向提供具体指导。一本名为《量子控制工程，泰勒和弗朗西斯》的新文本将由国际和平研究所和普渡大学的R.Chakrabarti教授共同撰写。在原子和分子尺度上控制动力学事件是许多科学领域的核心。建立在量子力学的基础上，并在20世纪60年代引入激光的S，一个突出的目标是实现埃斯特罗姆长度尺度和超快时间尺度的控制。这一领域的动机是操纵和理解基本的动力学过程以及各种应用的前景。通过引入量子力学中的工程控制概念和开发超快激光脉冲成形工具，解决这些目标达到了一个里程碑。许多新兴的实验展示了该领域的许多基本原则和前景。这项研究涉及理论概念、工具和算法的高级发展，以从根本上探索量子现象的控制。这些进展旨在为更好地利用实验室控制能力和提取从实验中产生的信息提供手段。

Professor Herschel A. Rabitz of Princeton University is supported by the Chemical Theory, Models and Computational Methods Program to develop new theoretical concepts for quantum control. The control of quantum phenomena entails interceding in the normal evolution of dynamical events through the introduction of external fields. Quite surprisingly, finding optimal fields for this purpose is proving to be easier than anticipated both in simulations and in the laboratory. At Princeton, an effort has been underway to fundamentally understand the origins of this behavior. In particular, at the most basic level, the structure of the control landscape needs to be understood, where a control landscape is the physical observable as a function of the controls. A family of theoretical and computational analysis tools will be used to analyze these landscapes with the aim of ultimately providing insights into identifying the basic rules for controlling quantum phenomena. Part of this effort will include revealing the mechanisms by which control is achieved and the role of general Hamiltonian structure in facilitating control. The outcome of this research is expected to be a deeper understanding of controlled quantum phenomena along with specific guidance towards promising experimental directions for the field. A new text titled, Quantum Control Engineering, Taylor and Francis, will be co-authored by the PI and Professor R. Chakrabarti, Purdue University.The control of dynamical events at the atomic and molecular scale is at the heart of many areas of science. Building on the foundations of quantum mechanics and the introduction of the laser in the 1960's, an outstanding objective has been to achieve control at Angstrom length scales and ultrafast time scales. This field is motivated by the desire to manipulate and understand the fundamental dynamical processes as well as the prospects for a variety of applications. Addressing these goals reached a milestone through the introduction of engineering control concepts within quantum mechanics and the development of ultrafast laser pulse shaping tools. Hosts of emerging experiments demonstrate many of the basic principles and promise for the field. This research concerns the advanced development of theoretical concepts, tools and algorithms to fundamentally explore the control of quantum phenomena. These advances aim to provide the means to better exploit the laboratory control capabilities and extract the information generated from the experiments.