Collaborative development of tools for optimal control of open quantum systems

加州大学伯克利分校的研究人员将与德国卡塞尔的克里斯蒂安·科赫教授团队合作，开发在现实环境中控制量子系统的理论工具。长期目标是确定在一般条件下，当量子系统不是孤立的，而是与其周围环境相互作用时，量子控制的机会及其局限性。量子控制领域的这种扩展到量子系统与环境接触时所经历的一般非么正动力学，对于实现高保真量子操作至关重要，而高保真量子操作是许多新的和发展中的量子技术所需的，这些领域包括量子信息、超冷气体和纳米器件。这些合作将把伯克利大学在量子控制的代数和分析方法方面的专业知识与卡塞尔使用的数值最优控制方法结合起来，为确定开放量子系统的可控性程度制定新的、物理激励的和易于数值处理的方法。该研究小组将致力于开发一套数值工具，用于在量子物理、化学物理和量子设备社区感兴趣的现实开放量子系统上优化量子控制。建立这些合作将使学生和博士后能够在广泛的量子动力学研究中学习和实施最先进的高级数字最优控制理论方法。伯克利分校学生和博士后到卡塞尔的互访将产生更广泛的影响，让美国研究生和博士后接触到欧洲的研究和教育体系，并让他们有机会与欧洲研究小组的科学家合作。

The researchers from University of California-Berkeley will establish collaborations with the group of Professor Christiane Koch in Kassel, Germany for development of theoretical tools for control of quantum systems in realistic environments. The long term goals are to identify the opportunities for quantum control and its limitations under general conditions when a quantum system is not isolated but interacts with its surroundings. This extension of the field of quantum control to the general non-unitary dynamics experienced by quantum systems in contact with an environment is essential for achieving the high fidelity quantum operations that are required by the many new and developing quantum technologies arising from fields including quantum information, ultracold gases and nanoscale devices. The collaborations will combine the expertise in algebraic and analytic methods of quantum control at Berkeley with the numerical optimal control methods used in Kassel, to formulate new, physically motivated and numerically tractable methodologies for determining the extent of controllability of open quantum systems. The research group will work to develop a set of numerical tools for optimization of quantum control on realistic open quantum systems of interest to the quantum physics, chemical physics and quantum device communities. Establishing these collaborations will enabling students and postdocs to learn and implement state of the art high level numerical optimal control theoretic methods in a broad range of quantum dynamical studies. Exchange visits of Berkeley students and postdocs to Kassel will have the broader impact of exposing US graduate students and postdoc to the European research and education system, as well as giving them the opportunity to collaborate with scientists in a European research group.