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Author

Amitis Shidani

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#machine learning Preprint Oct 2026

ORCA: Hunting Compositional Failures in Text-to-Image Diffusion

Text-to-image diffusion models fail predictably on compositional prompts: attributes bind to the wrong objects, spatial relations invert, and multi-object scenes lose count. Recent architectures already augment CLIP with a T5 encoder precisely because CLIP's contrastive embedding loses compositional structure, yet thes...

Arshia Hemmat, Amirhossein Vahidi, Amitis Shidani et al. · 0 citations
#artificial intelligence Preprint Sep 2026

On Trajectory-Aware Training for Masked Diffusion Language Models

Masked diffusion models (MDMs) generate text by unmasking several tokens per step, but they are trained and sampled under different conditions. The model is trained on randomly masked sequences, whereas inference follows a trajectory shaped by the model's own predictions. Additionally, each step has no access to what t...

Manuel Madeira, Amitis Shidani, Alice Bizeul et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Limits of Confidence in Diffusion

It is shown that a step matches the training distribution only when the positions it writes are conditionally independent given the tokens already fixed, that no product of per-position distributions can match a dependent group, and that per-position distributions do not determine whether a group is dependent.

Russ Webb, Amitis Shidani, Alice Bizeul et al. · 1 citation

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