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M. Bessafi

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Preprint Sep 2026

From Block-encoding to Generalized Quantum Signal Processing: Principles, Algorithms and Applications

Modern quantum algorithms are increasingly formulated as coherent procedures for implementing polynomial transformations of operators and singular values. This perspective provides a powerful and unifying language for quantum algorithm design, connecting a wide range of distinct problems through five closely related ke...

Tal Gurfinkel, Kaushika De Silva, A. Mahasinghe et al. · 0 citations
#machine learning Preprint Sep 2026

Symmetry without a manifold: intrinsic dimension on orbits

The standard geometric derivation of neural scaling exponents takes the intrinsic dimension of a data manifold as its input. On modular addition in $\mathbb{Z}_p$ that derivation has no input. The exact algebraic solution is an orbit of $\mathbb{Z}_p$ acting by isometries. Transitivity alone makes the ratio statistic u...

Chon-Fai Kam, M. Bessafi, Frédéric Cadet · 0 citations
#machine learning Preprint Sep 2026

Structured Features Overfit Where Random Features Grok

Xu, Vardi and Safran (ICML 2026) prove that over-parameterized ridge regression over an unstructured random Gaussian feature map groks, with the delay between memorization and generalization growing as $1/\lambda$ in the weight decay. We show that on a structured feature map the same delay does not appear. For a band-l...

Chon-Fai Kam, M. Bessafi, Frédéric Cadet · 0 citations
Review Open access Aug 2026

Diffusion-Based Protein Structure Design: Geometric Modelling, Validation Strategies, and Thermodynamic Challenges

This review focuses on coordinate- and residue-frame-based diffusion approaches for generating protein structures, paying particular attention to geometric equivariance, conditioning strategies, all-atom modelling and interaction-aware design.

Wen-Ran Li, Xavier F. Cadet, David Medina-Ortiz et al. · 0 citations

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