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Gerhard Stenzel

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Preprint Sep 2026

When Can Quantum Extreme Learning Machines Replace Quantum Reservoirs?

A simple two-qubit reservoir is constructed that performs temporal recall exactly, while every fixed-window predictor faces the same positive worst-case error over unbounded delays, regardless of model capacity.

M. Baumann, Gerhard Stenzel, Jonas Stein et al. · 0 citations
Book Open access Aug 2026

On Representation Smoothness for Robust Architecture Discovery of Variational Quantum Circuits

This work analyzes the effect of encoding discontinuities on diversity-driven discovery and introduces two representation refinements: a smooth, continuous mechanism for gate selection and a factorized representation that separates structural discovery from continuous parameter optimization.

Maximilian Zorn, Jonas Stein, Philipp Altmann et al. · 0 citations
#reinforcement learning Open access Aug 2026

Emergent problem-graph alignment in RL-discovered entanglement topologies for QAOA

In the Quantum Approximate Optimization Algorithm (QAOA), the entanglement topology, where qubit pairs are connected by two-qubit gates, is conventionally set equal to the edge set of the problem graph. This coupling ties circuit design to explicit problem knowledge and may not yield the most trainable circuit under li...

Tobias Rohe, Federico Harjes Ruiloba, Markus Baumann et al. · 0 citations
#machine learning Preprint Sep 2026

Variational Quantum Transformer Architecture for Synthetic Language Generation

We propose a compact NISQ-compatible quantum transformer architecture for synthetic QNLP sequence modelling. The model preserves the autoregressive next-token interface of a classical transformer, but replaces attention and feed-forward sublayers with variational quantum encoder blocks, connector circuits, decoder bloc...

Julian Hager, Michael Kölle, Gerhard Stenzel et al. · 0 citations
Book Open access Jul 2026

Towards Variation via Foundation Model: An Empirical Study of a Problem-Agnostic No-Code LLM-Guided Evolutionary Algorithm

The natural-language-based genetic algorithm (NaLaGA) shows that a generic, problem-independent genetic algorithm (GA) can function by utilizing large language models (LLMs) for all interactions with the solution candidates without ever running any LLM-generated code. We analyze inherent biases in the function of a NaL...

Sarah Gerner, Gerhard Stenzel, Thomas Gabor · 0 citations

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