Improving zero-shot retrieval using dense external expansion

作者：

Highlights：

• Dense external expansion improves zero-shot retrieval performance.

• High quality feedback documents can be retrieved using dense external expansion.

• Experimental results show significant improvements using ColBERT-PRF and ANCE-PRF external expansion.

摘要

•Dense external expansion improves zero-shot retrieval performance.•High quality feedback documents can be retrieved using dense external expansion.•Experimental results show significant improvements using ColBERT-PRF and ANCE-PRF external expansion.

论文关键词：Query expansion,Pseudo-relevance feedback,Dense retrieval,Information retrieval

论文评审过程：Received 20 May 2022, Revised 7 July 2022, Accepted 8 July 2022, Available online 2 August 2022, Version of Record 2 August 2022.

论文官网地址：https://doi.org/10.1016/j.ipm.2022.103026