AI RESEARCH
Training-Free Lexical-Dense Fusion for Conversational-Memory Retrieval
arXiv CS.LG
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ArXi:2606.04194v1 Announce Type: new Retrieving the few past turns that answer a new query across long multi-session histories is the retrieval bottleneck behind long-term conversational memory (LoCoMo, LongMemEval). Recent concurrent work, Nano-Memory, shows that scoring a session by the maximum query-turn similarity (late interaction, "Turn Isolation Retrieval") beats mean-pooled session embeddings. We do not claim that effect; we replicate it and ask what a