Author

Yicong Hong

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Preprint Aug 2026

Can Video World Models Track Unobserved World States?

An action-conditioned video Shell Game, a visual analogue of $S_5$ state tracking that separates visual rendering from compositing the unobserved world state, and finds that length generalization requires a revisable state carried across chunks and an update expressive enough to apply a swap.

Joonghyuk Shin, Yi-Cong Hong, Jaesik Park et al. · 2 citations

Jul 2026

Chimera: Designing and Chinchilla-Scaling Hybrid Visual Diffusion Transformers

Chimera, a hybrid visual diffusion backbone with a principled scaling recipe that combines Kimi Delta Attention for long-context state tracking with O(N) complexity, interleaved Multi-head Latent Attention (MLA) for direct global interaction, and modality-aware short convolutions for local spatiotemporal context is int...

Chongjian Ge, Hanwen Jiang, Tianyu Wang et al. · arXiv.org · 2 citations