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Sixia Sun

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#small language model Preprint Aug 2026

Query Expansion Is More Than Generation: Improving Dense Retrieval through Better Integration

This work introduces AnchorQE, a training-free method that separately encodes the original query and its expansion before interpolating them, and shows that AnchorQE improves retrieval effectiveness by up to 12.89% when compared to widely-used expansion-only or text-level concatenation baselines across TREC-DL, LoTTE,...

Sixia Sun, Mihai Surdeanu · 0 citations