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Xun-Lei Chen

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#natural language process... Preprint Oct 2026

Not Every Change Is Necessary: Recoverable Drift in Large Language Model Unlearning

Machine unlearning in large language models aims to remove unwanted knowledge while preserving the model's remaining capabilities. Although existing methods use retention objectives or restrict where edits occur, achieving the desired forgetting level can still leave collateral changes that impair non-target behavior....

Xun-Lei Chen, Qing Gong, Jing-Kun Xue et al. · 0 citations
#diffusion models Preprint Sep 2026

Gaussian Core LoRA: Distribution-Aware Dynamic Adaptation for Broad Concept Erasure

Gaussian Core LoRA, a distribution-aware low-rank adaptation framework that enables prototype-adaptive erasure with a single lightweight adapter, and shows robustness to adversarial prompts, scalability to multi-identity and multi-style erasure, and compatibility with SDXL and FLUX.

Qing Gong, Xun-Lei Chen, Yu-Xuan Zhang et al. · 0 citations
Preprint Aug 2026

Unlearning Is Not Just Erasing: Temporal Decoupling via Generation Inequality

ADU is presented, a fine-grained, training-based framework that shifts unlearning from token erasure to contextual attention-pathway decoupling, and achieves the strongest aggregate performance among evaluated baselines on the TOFU and WMDP benchmarks.

Xun-Lei Chen, Qi-Rui Ye, Yuang Li et al. · 0 citations

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