A Practical Introduction for Developing and Operating Hybrid Quantum Applications

With the increasing number of quantum computers available via the cloud, the research area of quantum software engineering is emerging. Its goal is the investigation of concepts and guidelines to develop and operate hybrid quantum applications, ensuring engineering principles such as modularity, reuse, and maintainability. In this tutorial, we provide an overview of state-of-the-art concepts and techniques in quantum computing, as well as quantum software engineering. It includes an introduction of selected essential quantum algorithms, limitations of current quantum computers, and a lifecycle for hybrid quantum applications. Furthermore, we show how the service-oriented development of hybrid quantum applications increases their modularity and reusability. Finally, we demonstrate the orchestration of the required classical and quantum programs using workflows and their automated deployment.