Provide support for combined keyword and semantic search using RRF.
the hybrid search in Atlas is performed like this - https://www.mongodb.com/docs/atlas/atlas-vector-search/tutorials/reciprocal-rank-fusion/
The Hybrid search retriever in LlamaIndex shows up like this :
https://docs.llamaindex.ai/en/stable/examples/vector_stores/PineconeIndexDemo-Hybrid/
https://docs.llamaindex.ai/en/stable/examples/vector_stores/PineconeIndexDemo-Hybrid/
https://docs.llamaindex.ai/en/stable/examples/query_engine/CustomRetrievers/