Over the past decade, a wide variety of experimental quantum computing hardware has been invented and used for fundamental demonstrations in laboratories. Initial results confirm the feasibility of such hardware in real-world applications. Recently, one can observe upcoming research in areas like traffic flow optimization, mobile sensor placement, machine learning, and many more. The development of quantum computing hardware, be it in the quantum gate model or adiabatic quantum computation (quantum annealing), has made huge progress in the past few years. This started to transfer know-how from quantum technology-based research to algorithms and applications. This development is offering numerous opportunities to contribute within research, theory, applied technologies, and engineering. The First International Workshop on Quantum Technology and Optimization Problems (QTOP 2019) was held in conjunction with the International Conference on Networked Systems (NetSys 2019) in Munich, Germany, on March 18, 2019. The aim of this workshop was to connect people from academia and industry to discuss theory, technology, and applications and to exchange ideas in order to move efficiently forward in engineering and development in the exciting area of quantum technology and optimization problems. This book comprises a section containing a keynote and four sections with scientific papers. The sessions deal with the following topics that are crucial to the development of future improvements in quantum technology and optimization problems:

• Analysis of optimization problems
• Quantum gate algorithms
• Applications of quantum annealing
• Foundations of quantum technology

The international call for papers resulted in the selection of the papers in these proceedings. The selection of the papers followed a rigorous review process involving an international expert group. Each paper was reviewed by at least three reviewers. We express our gratitude to all members of the Program Committee for their valuable work. We also want to thank the members of the Mobile and Distributed Systems Group, and especially the Quantum Applications and Research Laboratory (QAR-Lab) who were responsible for the organization of the conference.

QTOP 2019, Munich, Germany, March 18, 2019, Proceedings, Springer, 2019, vol. 11413