NEST : Nested Evidence Survival for Retrieval
Akshay Verma · Siddharth Pillai · Prateek Sircar · Deepak Gupta
摘要
Retrieval-Augmented Generation (RAG) systems degrade sharply under extreme noise, where relevant evidence is sparse and easily pruned by static retrieval decisions. Existing approaches fixed top-k retrieval, hierarchical chunking, cross-encoder reranking, or policy-based iterative control- either...