Research Areas

  • Quantum Optimization
  • Quantum Artificial Intelligence
  • Quantum Applications

Thesis Supervision

  • Mark Seebode, Jonas Stein, and Claudia Linnhoff-Popien, "A Logarithmic Depth Linear Space Algorithm for Implementing Quantum Walks", Research Internship
  • Nils Przybylla, Jonas Stein, and Claudia Linnhoff-Popien, "The Impact of Problem Formulation on the Spectral Gap in Adiabatic Quantum Optimization", Bachelor's Thesis
  • Levon Boos, Jonas Stein, and Claudia Linnhoff-Popien, "Multi-Objective Model Optimization for Federated Learning", Bachelor's Thesis
  • Venelin Petev, Jonas Stein, and Claudia Linnhoff-Popien, "Classifying Results of Connect Four Games using Geometric Quantum Machine Learning", Bachelor's Thesis
  • Mark Seebode, Jonas Stein, and Claudia Linnhoff-Popien, "Higher Order Quantum Boltzmann Machines", Research Internship
  • David Fersing, Jonas Nüßlein, Jonas Stein, and Claudia Linnhoff-Popien, "Formulation of the free-flow problem as a Quadratic Unconstrained Binary Optimization", Bachelor's Thesis

  • Markus Baumann, Tobias Rohe, Jonas Stein, and Claudia Linnhoff-Popien, "Optimizing Parameterized Quantum Hamiltonians via Implicit Differentiation", Master's Thesis
  • Shanice Ehioghiren, Maximilian Zorn, Jonas Stein, and Claudia Linnhoff-Popien, "Evaluation of Optimization Factors in Quantum Algorithms for Train Rerouting", Bachelor's Thesis
  • Markus Baumann, Jonas Stein, Tobias Rohe, and Claudia Linnhoff-Popien, "Sampling the Unseen: Holdout Recovery under Band-Limited Parity Constraints", Research Internship
  • Alexander Kovacs, Michael Poppel, Jonas Stein, and Claudia Linnhoff-Popien, "Empirical Evaluation of Quantum Circuit Ansatz Design Effects for Supervised Learning", Bachelor's Thesis
  • Joel Furtak, Jonas Stein, Michael Kölle, and Claudia Linnhoff-Popien, "Exploring the Practical Application of Quantum-Native Self-Attention for Quantum Vision Transformers", Master's Thesis
  • Tim Henningner, Leo Sünkel, Jonas Stein, and Claudia Linnhoff-Popien, "Anwendbarkeit von QAOA auf die Minimierung der Teleportationskosten im verteilten Quantencomputing", Bachelor's Thesis
  • Mark Seebode, Jonas Stein, Daniëlle Schuman, and Claudia Linnhoff-Popien, "An Empricial Evaluation of Quantum Annealing-Based Image Classification Using Discriminative Quantum Boltzmann Machines", Bachelor’s Thesis
  • Simon Hehnen, Michael Kölle, Jonas Stein, and Claudia Linnhoff-Popien, "Determining Semantic Links in Product Data Using Quantum Restricted Boltzmann Machines", Master’s Thesis
  • Alexander Feist, Michael Kölle, Jonas Stein, and Claudia Linnhoff-Popien, "Evaluating Parameter-Based Training Performance of Neural Networks and Variational Quantum Circuits", Bachelor’s Thesis
  • Carlotta von L’Estocq, Jonas Stein, and Claudia Linnhoff-Popien, "Leveraging Preconditioning to speed up quantum simulation-based optimization", Bachelor’s Thesis
  • Viktoria Patapovich, Jonas Stein, and Claudia Linnhoff-Popien, "Space-Efficient Quantum Optimization for the Traveling Salesman Problem via Binary Encoding of Feasible Solutions", Master’s Thesis
  • Federico Harjes Ruiloba, Tobias Rohe, Jonas Stein, and Claudia Linnhoff-Popien, "Neural Encoded VQEs for Combinatorial Optimization Problems", Bachelor’s Thesis
  • Jonathan Wulf, Jonas Stein, Maximilian Zorn, and Claudia Linnhoff-Popien, "State Preparation on Quantum Hardware Using an Island Genetic Algorithm", Master’s Thesis
  • Sabrina Egger, Jonas Stein, and Claudia Linnhoff-Popien, "Applying parameterized Quantum Walks in Reinforcement Learning", Master’s Thesis
  • Het Dave, Arnold Unterauer, Jonas Stein, and Claudia Linnhoff-Popien, "Explainable Time Series Forecasting using exogenous variables – How weather affects the stock market", Bachelor’s Thesis
  • David Fischer, Jonas Stein, Philipp Altmann, Dirk André Deckert, and Claudia Linnhoff-Popien, "A Path Towards Quantum Advantage for the Unit Commitment Problem", Bachelor’s Thesis
  • Jonas Blenninger, Jonas Stein, Maximilian Zorn, Peter Eder, and Claudia Linnhoff-Popien, "CUAOA: A Novel CUDA-Accelerated Simulation Framework for the Quantum Approximate Optimization Algorithm", Master’s Thesis
  • Jonathan Wulf, Jonas Stein, David Bucher, and Claudia Linnhoff-Popien, "Quantum Singular Value Transformation in Practice", Research Internship
  • Christopher Rieß, Jonas Stein, Michael Kölle, and Claudia Linnhoff-Popien, "Benchmarking Quantum Gaussian Processes", Research Internship
  • Jakob Mayer, Jonas Nüßlein, Jonas Stein, and Claudia Linnhoff-Popien, "Towards Efficient Arbitrage Detection: A Study on Quantum Algorithms", Bachelor’s Thesis
  • Nico Kraus, Jonas Stein, Jonas Nüßlein, and Claudia Linnhoff-Popien, "The Influence of Data Characteristics on the Efficacy of Forecasting Models", Research Internship
  • Constantin Economides, Jonas Stein, and Lode Pollet, "A Novel Quantum Circuit for Efficient Computation of Exponentially Large Weighted Sums in Variational Quantum Circuits", Master’s Thesis
  • Max Adler, Jonas Stein, Jonas Nüßlein, Nico Kraus, and Claudia Linnhoff-Popien, "Using Quantum Machine Learning to predict asset prices in financial markets", Master’s Thesis
  • Gerhard Stenzel, Michael Kölle, Jonas Stein, Andreas Sedlmeier, and Claudia Linnhoff-Popien, "Quantum-Enhanced Denoising Diffusion Model", Master’s Thesis
  • Vasily Bokov, Jonas Stein, Claudia Linnhoff-Popien, and Michael Wolf, "Exploring the suitability of efficient Quantum Kernels for exponential speedups", Master’s Thesis
  • Navid Roshani, Jonas Stein, and Lode Pollet, "Introducing sequential Hamiltonian assembly for training VQEs and its application in graph coloring", Masters’s Thesis
  • Dominik Ott, Jonas Stein, Jonas Nüßlein, and Claudia Linnhoff-Popien, "NISQ-ready community detection on weighted graphs using separation-node identification", Bachelor’s Thesis
  • Lorena Wemmer, Jonas Stein, Michael Kölle, Elena Van der Vorst, and Claudia Linnhoff-Popien, "Analyzing Reinforcement Learning strategies from a prameterized quantum walker", Bachelor’s Thesis
  • Anant Agnihotri, Jonas Stein, and Jeanette Lorenz, "Introducing Linear Entropy Based Community Detection", Master’s Thesis
  • Viktoryia Patapovich, Jonas Stein, Michael Kölle, Maximilian Balthasar Mansky, and Claudia Linnhoff-Popien, "Efficient quantum circuit architecture for coined quantum walks on many bipartite graphs", Bachelor’s Thesis
  • Ahmad Issa, Jonas Stein, Daniëlle Schuman, and Claudia Linnhoff-Popien, "Anomaly Detection using Quantum Circuit Born Machines", Bachelor’s Thesis
  • Ivo Christ, Jonas Stein, Robert Müller, and Claudia Linnhoff-Popien, "Investor sentiment analysis using classical and quantum algorithms", Master’s Thesis
  • Soren Little, Christoph Roch, Jonas Stein, and Claudia Linnhoff-Popien, "Structural Analysis of Graph Based Optimization Problems and their QUBO Formulations", Bachelor’s Thesis
  • David Münzer, Michael Kölle, Jonas Stein, and Claudia Linnhoff-Popien, "Data Embedding for efficient Quantum Machine Learning", Bachelor’s Thesis
  • Petros Stougiannidis, Jonas Stein, Sebastian Feld, and Claudia Linnhoff-Popien, "Introducing a space-efficient polynomial rotation circuit for bypassing traditional Quantum Arithmetic in NISQ-applications of HHL and beyond", Bachelor’s Thesis
  • Leopold Bodendörfer, Jonas Stein, Michael Kölle, and Claudia Linnhoff-Popien, "Efficient Data Embedding for offline Handwriting Recognition using Quantum Support Vector Machines", Bachelor’s Thesis
  • Johannes Kolb, Jonas Stein, Christoph Roch, and Claudia Linnhoff-Popien, "Comparing the performance of PUBO and QUBO based QAOA for continuous optimization problems", Bachelor’s Thesis
  • Tobias Rohe, Jonas Stein, Julian Hager, and Claudia Linnhoff-Popien, "Introducing a Hardware-efficient Layer-VQE based Ansatz", Bachelor’s Thesis
  • Franziska Wörle, Jonas Stein, Maximilian Mansky, Robert Müller, and Claudia Linnhoff-Popien, "Possibilities and limitations of Quantum Machine Translation: Adaption of the DisCoCat-Model for Question Answering in the Chinese Language", Bachelor’s Thesis
  • Jonathan Wulf, Jonas Stein, Michael Kölle, and Claudia Linnhoff-Popien, "Efficient embedding in Quantum Support Vector Machines using a specialized NISQ approach", Bachelor’s Thesis
  • Philip Hierhager, Sebastian Zielinski, Jonas Stein, and Claudia Linnhoff-Popien, "Evaluation of quantum-classical hybrid algorithms for solving 3-SAT problems", Bachelor’s Thesis
  • Ivelina Bozhinova, Jonas Stein, Sebastian Feld, and Claudia Linnhoff-Popien, "Pruning the search space in QUBO-based Community Detection", Master’s Thesis
  • Kai-Chun Lin, Jonas Stein, Christoph Roch, and Claudia Linnhoff-Popien, "Community Detection in Multilayer Networks via Quantum Annealing", Master’s Thesis
  • Maximilian Beer, Jonas Stein, Sebastian Feld, and Claudia Linnhoff-Popien, "Local Community Detection via Quantum Walks in the Quantum Gate Model", Bachelor’s Thesis
  • Moritz Finsterwalder, Christoph Roch, Jonas Stein, and Claudia Linnhoff-Popien, "Optimizing Shift Plans Using Classical Methods", Bachelor’s Thesis
  • Peter Lang, Jonas Stein, Sebastian Feld, and Claudia Linnhoff-Popien, "Optimized Community Detection through edge deletion on quantum annealers", Bachelor’s Thesis
  • Bob Godar, Christoph Roch, Jonas Stein, and Claudia Linnhoff-Popien, "Optimizing a Quantum Key Distribution Network using Quantum Annealing", Masters’s Thesis

Teaching

  • Quantum Computing Programming: SS26, WS25/26, SS25, WS24/25, SS24, WS23/24, SS23, WS22/23, SS22, WS21/22, SS21

  • Trends in Mobile and Distributed Systems: WS25/26, SS25, WS24/25, W23/24, SS21
  • Advanced Topics in Mobile and Distributed Systems: SS25, SS24, WS23/24, SS23, WS22/23, SS22, W21/22
  • Current Developments and Perspectives in Artificial Intelligence: SS26

  • Working Group Quantum Computing: SS26, WS25/26

Scientific Services

  • Physical Review Applied (2026)
  • ACM Transactions on Quantum Computing (2026, 2025, 2024, 2023)
  • EPJ Quantum Technology (2026)
  • Springer Nature Quantum Machine Intelligence (2026)
  • Springer Nature Quantum Information Processing (2025, 2024)
  • International Conference on Machine Learning (2026)
  • Informs Journal on Computing (2025)
  • Transactions on Machine Learning Research (2025)
  • Workshop on Quantum Artificial Intelligence and Optimization @ ICAART (2026)

  • IEEE International Conference on Quantum Computing and Engineering, Quantum Applications Track (2025, 2024)
  • International Workshop on Quantum Machine Learning:
    From Research to Practice @QCE (2026, 2025, 2024)

  • Publicity Chair of IEEE QAI (2027)
  • Topic Editor for a Special Session of Frontiers in Quantum Science and Technology (2026)
  • Member of the ACM (2026)
  • Session Chair at IEEE QCE (2025, 2024)

Selected Publications

Caution

The following list of publications is not necessarily up to date. For the complete list, see my Google Scholar profile.

Publications

2026

  • David Bucher, Maximilian Janetschek, Michael Poppel, Jonas Stein, Claudia Linnhoff-Popien, and Sebastian Feld. Constrained Quantum Optimization via Iterative Warm-Start XY-Mixers.In: New Journal of Physics (2026). arXiv: 2604.02083. (in press)
  • Markus Baumann, Claudia Linnhoff-Popien, and Jonas Stein. Exploiting More Than Symmetry in Variational Quantum Machine Learning. In: 2026 IEEE International Conference on Quantum Computing and Engineering (QCE). Toronto, ON, Canada: IEEE Computer Society, Sept. arXiv: 2606.20316. (in press)
  • Markus Baumann, Itamar Fink, Johannes Wittmann, Claudia Linnhoff-Popien, and Jonas Stein. Where a Quantum Reservoir Works: A Transferable Operating Band. In: 2026 IEEE International Conference on Quantum Computing and Engineering (QCE). Toronto, ON, Canada: IEEE Computer Society, Sept. 2026. arXiv: 2606.13284. (in press)
  • Leo Suenkel, Claudia Linnhoff-Popien, and Jonas Stein. Distributed Training of Variational Quantum Circuits using Telegates. In: 2026 IEEE International Conference on Quantum Computing and Engineering (QCE). Toronto, ON, Canada: IEEE Computer Society, Sept. 2026. (in press)
  • Julian Hager, Michael Kölle, Gerhard Stenzel, Tobias Rohe, Jonas Stein, and Claudia Linnhoff-Popien. Variational Quantum Transformer Architecture for Synthetic Language Generation. In: Quantum AI and NLP. Cham: Springer Nature Switzerland, 2026. (in press)
  • Markus Baumann, Daniel Hein, Steffen Udluft, Tobias Rohe, Claudia Linnhoff-Popien, and Jonas Stein. Parity Supervision as a Driver of Generalization in Quantum Generative Modeling. In: 2026 IEEE International Conference on Quantum Computing and Engineering (QCE). Toronto, ON, Canada: IEEE Computer Society, Sept. 2026. arXiv: 2605.10258. (in press)
  • Michael Poppel, David Bucher, Maximilian Zorn, Nico Kraus, Philipp Altmann, Jonas Stein, and Claudia Linnhoff-Popien. Mitigating Exponential Mixed Frequency Growth in QML. In: 2026 IEEE International Conference on Quantum Computing and Engineering (QCE). Toronto, ON, Canada: IEEE Computer Society, Sept. 2026. arXiv: 2508.10533. (in press)
  • Maximilian Zorn, Jonas Stein, Philipp Altmann, Gerhard Stenzel, Tobias Rohe, and Claudia Linnhoff-Popien. On Representation Smoothness for Robust Architecture Discovery of Variational Quantum Circuits. In: Proceedings of the 32nd ACM SIGKDD Conference on Knowledge Discovery and Data Mining. KDD’26. Jeju, Korea: Association for Computing Machinery, 2026. (in press)
  • Jonas Stein, Maximilian Zorn, Leo Sünkel, and Thomas Gabor. Quantum Optimization Algorithms. In: Combinatorial Optimization Using Quantum Computing – A Gentle Introduction. Ed. by Francisco Chicano, Alberto Moraglio, and Ofer M. Shir. Natural Computing Series. Springer Nature, 2026. Chap. 6. arXiv: 2511.12379. (in press)
  • Gerhard Stenzel, Tobias Rohe, Michael Kölle, Leo Sünkel, Jonas Stein, and Claudia Linnhoff-Popien. Illustration of Barren Plateaus in Quantum Computing. In: Proceedings of the 18th International Conference on Agents and Artificial Intelligence – Volume 1: QAIO. INSTICC. SciTePress, 2026. pp. 731–742. arXiv: 2602.16558.

2025

2024

2023

2022

  • Thomas Gabor, Michael Lachner, Nico Kraus, Christoph Roch, Jonas Stein, Daniel Ratke, and Claudia Linnhoff-Popien. Modifying the quantum-assisted genetic algorithm. In: Proceedings of the Genetic and Evolutionary Computation Conference Companion. GECCO ’22 Companion. Boston, Massachusetts: Association for Computing Machinery, 2022, pp. 2205–2213.

Preprints

2026

  • Markus Baumann, Michael Poppel, Thomas Gabor, Maximilian Zorn, Claudia Linnhoff-Popien, and Jonas Stein. Exploiting Symmetry in Quantum Reservoir Computing. arXiv: 2607.01187.
  • Jonas Stein, Jannis Lutz, Moritz Sölderer, Maximilian Adler, Michael Lachner, David Bucher, and Claudia Linnhoff-Popien. End-to-End Speedup for Quantum Simulation-Based Optimization in Power Grid Management. arXiv: 2505.16444.
  • Michael Poppel, David Bucher, Maximilian Zorn, Markus Baumann, Sebastian Wölckert, Claudia Linnhoff-Popien, Philipp Altmann, and Jonas Stein. Architecture Shape Governs QNN Trainability: Jacobian Null Space Growth and Parameter Efficiency. arXiv: 2605.05942.
  • Markus Baumann, Maximilian Zorn, Thomas Gabor, Claudia Linnhoff-Popien, and Jonas Stein. Reorganizing Quantum Measurement Records Improves Time-Series Prediction. arXiv: 2604.28160.
  • Maximilian Zorn, Melinda Braun, Michael Ertl, Tommy Kiss, Sara Juarez Oropeza, Claudia Linnhoff-Popien, and Jonas Stein. Quantum Optimization Methods for the Generalized Traveling Salesman Problem. arXiv: 2604.25531.
  • Michael Poppel, Jonas Stein, Sebastian Wölckert, Markus Baumann, and Claudia Linnhoff-Popien. Long Range Frequency Tuning for QML. arXiv: 2602.23409.
  • Philipp Altmann, Maximilian Mansky, Maximilian Zorn, Jonas Stein, and Claudia Linnhoff-Popien. Quantum Generator Kernels. arXiv: 2602.00361.
  • Marvin Erdmann, Lukas Karch, Abhishek Awasthi, Caitlin Isobel Jones, Pallavi Bhardwaj, Florian Krellner, Jonas Stein, Claudia Linnhoff-Popien, Nico Kraus, Peter Eder, Sarah Braun, and Tong Liu. Quantum Computing — Strategic Recommendations for the Industry. arXiv: 2601.08578.

2025

  • Tobias Rohe, Federico Harjes Ruiloba, Sabrina Egger, Sebastian von Beck, Jonas Stein, and Claudia Linnhoff-Popien. Quantum Computer Benchmarking: An Explorative Systematic Literature Review. arXiv: 2509.03078.

2023

  • Jonas Stein, Lukas Müller, Leonhard Höscher, Georgios Chnitidis, Jezer Jojo, Afrah Farea, David Bucher, Jonathan Wulf, David Fischer, Philipp Altmann, M Serdar Çelebi, Claudia Linnhoff-Popien, and Sebastian Feld. Exponential Quantum Speedup for Simulation-Based Optimization Applications. arXiv: 2305.08482.

2021

  • Bob Godar, Christoph Roch, Jonas Stein, Marc Geitz, Bettina Lehmann, Matthias Gunkel, Volker Fürst, and Fred Hofmann. Optimization of QKD Networks with Classical and Quantum Annealing. arXiv: 2206.14109.