作者位次 #2/3SIGIR 2026Poster· Information Retrieval (Short)
Spectral Tempering for Embedding Compression in Dense Passage Retrieval
Yongkang Li · Panagiotis Eustratiadis · Evangelos Kanoulas
摘要
Dimensionality reduction is critical for deploying dense retrieval systems at scale, yet mainstream post-hoc methods face a fundamental trade-off: principal component analysis (PCA) preserves dominant variance but underutilizes representational capacity, while whitening enforces isotropy at the c...