[AARR] LLM-Augmented Retrieval: Enhancing Retrieval Models Through Language Models and Doc-Level Embedding

The Align AI Research Review discusses Generative AI technologies and their limitations based on training data. It introduces Retrieval Augmented Generation (RAG) as an alternative solution to these challenges, integrating external knowledge sources into Language Models (LLMs). Meta's paper proposes a novel model-agnostic framework called LLM-augmented retrieval, which enhances the performance of existing retriever models by improving document embeddings through LLM augmentation. The framework involves generating synthetic relevant queries and titles for original documents, splitting long documents into passages, and adapting retrieval frameworks for varied model architectures. While this approach offers improvements in information retrieval tasks, it also presents challenges such as increased computational demand and potential vulnerability to errors or biases from large language models.