Scaling Behavior of Query-Augmented Passage Representations in Zero-Shot Cross-Lingual Retrieval
Abstract
Effective cross-lingual dense retrieval methods that rely on multilingual pre-trained language models (PLMs) need to be trained to encompass both the relevance matching task and the cross-language alignment task. However, cross-lingual data for training is often scarcely available. In this paper, rather than using more cross-lingual data for training, we propose to use cross-lingual query generation to augment passage representations with queries in languages other than the original passage language. These augmented representations are used at inference time so that the representation can enco Research goal: How does the scaling behavior of query-augmented passage representations compare to direct cross-lingual training when evaluated on the MTEB benchmark for zero-shot cross-lingual retrieval tasks? Autonomous synthesis report generated by Assignee Research. Tribunal consensus score: 8.0/10.
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