Author

Youjin Wang

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#artificial intelligence Mar 2026

InfoMamba: An Attention-Free Hybrid Mamba-Transformer Model

A consistency boundary analysis is presented that characterizes when diagonal short-memory SSMs can approximate causal attention and identifies structural gaps that remain and proposes InfoMamba, an attention-free hybrid architecture that consistently outperforms strong Transformer and SSM baselines.

Youjin Wang, Jiaqi Zhao, Rong Fu et al. · arXiv.org · 0 citations

#artificial intelligence Preprint Feb 2026

ASA: Backbone-Training-Free Representation Engineering for Tool-Calling Agents

Activation Steering Adapter (ASA), a training-free, inference-time controller that performs a single-shot mid-layer intervention and targets tool domains via a router-conditioned mixture of steering vectors with a probe-guided signed gate to amplify true intent while suppressing spurious triggers is proposed.

Youjin Wang, Run Zhou, Rong Fu et al. · 4 citations · ⚡2