Distilling Dense Representations for Ranking using Tightly-Coupled Teachers

22 Oct 2020 Sheng-Chieh Lin Jheng-Hong Yang Jimmy Lin

We present an approach to ranking with dense representations that applies knowledge distillation to improve the recently proposed late-interaction ColBERT model. Specifically, we distill the knowledge from ColBERT's expressive MaxSim operator for computing relevance scores into a simple dot product, thus enabling single-step ANN search... (read more)

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