TheBlinQC

对复杂量子系统的精确控制对于量子技术的发展非常重要，因为它允许在系统固有缺陷的情况下以高精度实现许多目标。然而，在实践中实现这一点是一个巨大的挑战，因为它需要精确的模型和昂贵的数值模拟。这个项目的中心目标是开发和实施控制技术，这些技术不需要理论建模、模拟或任何关于系统微观分解的知识。相反，所有必要的信息都将直接从实验中获得。我们将确定能够很好地描述量子系统所需特性的控制目标，并且可以在实验中准确而有效地估计这些目标。基于对这些目标的评估和它们对可调控制参数的依赖，我们将开发控制算法，以便在最小数量的实验测量中找到最优控制协议。这些方法将在多体系统实验模拟和实际实验实施之间直接相互作用。在模拟中，我们将以多体局域态和时间晶体结构的创造和稳定为目标，这将证明新的控制技术可以处理最先进的量子多体问题。在实验上，我们将考虑高度非经典态的悬浮纳米球的制备和里德堡原子大晶体的形成。通过对一个极大质量的量子物体进行实验，以及对许多强相互作用的量子系统进行实验，我们将能够在实验中实现现有控制技术显然无法达到的目标。在验证了控制技术的有效性后，我们将开发一个软件包并将其公开，使其在量子技术的发展中有广泛的应用。

Accurate control of complex quantum systems is of great importance for the development ofquantum technologies, as it permits to achieve many goals with high accuracy despite inherentsystem imperfections. Realising this in practice, however, is a great challenge, since it requiresprecise models and numerically expensive simulations.The central goal of this project is to develop and implement control techniques that do notrequire theoretical modelling, simulation or any knowledge of a systems' microscopicdecomposition. Instead, all necessary information will be obtained directly from the experiment.We will identify control targets that characterise desired properties of quantum systems well,and that can be estimated accurately and efficiently in an experiment. Based on theassessment of these targets and their dependence on tunable control parameters, we willdevelop control algorithms such that an optimal control protocol is found within a minimalnumber of experimental measurements.These methods will be developed in direct interplay between simulations of experiments withmany--body systems and actual experimental implementations. In simulations we will target thecreation and stabilisation of many--body localised states and time--crystalline structures, thatwill give evidence that the novel control techniques can cope with state--of--the--art quantummany--body problems. Experimentally we will consider the preparation of highly non--classicalstates of a levitated nano--sphere and the formation of large crystals of Rydberg atoms. Withan experiment on an extremely massive quantum object and an experiment with many,strongly interacting quantum systems, we will be able to experimentally achieve goals that areclearly out of reach with existing control techniques.Having verified the efficacy of the control techniques, we will develop a software package andmake it publicly available such that it finds broad application in the development of quantumtechnologies.