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Author

Neil K. Chada

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#machine learning Preprint Sep 2026

Robustness of Diffusion Models under Distribution Shift

This work studies robust score estimation under Wasserstein perturbations of a reference distribution of Ornstein--Uhlenbeck diffusion and characterize how finite data, intrinsic dimension, and distribution shift affect the robustness of score-based diffusion models.

Wei Luo, N. K. Chada, Shi-Jie Zhang et al. · 0 citations
Open access Aug 2026

Unbiased kinetic Langevin Monte Carlo with inexact gradients

Theoretical analysis demonstrates that the proposed estimator is unbiased, attains finite variance, and satisfies a central limit theorem, and the results demonstrate that in large-scale applications, the unbiased algorithm can be 2–3 orders of magnitude more efficient than the “gold-standard” randomized Hamiltonian Mo...

N. K. Chada, B. Leimkuhler, Daniel Paulin et al. · 0 citations

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