6 papers
Activation Steering for Aligned Open-ended Generation without Sacrificing Coherence
Niklas Herbster, Martin Zborowski, Alberto Tosato +2
Alignment in LLMs is more brittle than commonly assumed: misalignment can be induced by adversarial prompts, benign fine-tuning, emergent misalignment, and goal misgeneralization.…
Buried unstrained germanium channels: a lattice-matched platform for quantum technology
Davide Costa, Patrick Del Vecchio, Karina Hudson +8
Strained Ge (-Ge) and strained Si (-Si) buried quantum wells have enabled advanced spin-qubit quantum processors. However, in the absence of suitable lattice-matched substr…
Persistent Instability in LLM's Personality Measurements: Effects of Scale, Reasoning, and Conversation History
Tommaso Tosato, Saskia Helbling, Yorguin-Jose Mantilla-Ramos +5
Large language models require consistent behavioral patterns for safe deployment, yet there are indications of large variability that may lead to an instable expression of personal…
Using Landau quantization to probe disorder in semiconductor heterostructures
Asser Elsayed, Davide Costa, Lucas E. A. Stehouwer +5
Understanding scattering mechanisms in semiconductor heterostructures is crucial to reducing sources of disorder and ensuring high yield and uniformity in large spin qubit arrays.…
QARPET: A Crossbar Chip for Benchmarking Semiconductor Spin Qubits
Alberto Tosato, Asser Elsayed, Federico Poggiali +5
Large-scale integration of semiconductor spin qubits into quantum processors hinges on the ability to characterize quantum components at scale, a task challenged by their operation…
Exploiting epitaxial strained germanium for scaling low noise spin qubits at the micron-scale
Lucas E. A. Stehouwer, Cécile X. Yu, Barnaby van Straaten +10
Disorder in the heterogeneous material stack of semiconductor spin qubit systems introduces noise that compromises quantum information processing, posing a challenge to coherently…