Large Language Models in Recommender Systems

The field of recommender systems is witnessing a significant shift towards the integration of large language models (LLMs) to enhance recommendation accuracy, diversity, and personalization. Recent developments have focused on leveraging LLMs to address long-standing challenges in recommender systems, such as sparse and noisy interaction data, cold-start problems, and limited semantic understanding of user and item content. Notable advancements include the use of LLMs for prompt-driven candidate retrieval, language-native ranking, and generative recommendation. Furthermore, researchers have proposed innovative frameworks that combine LLMs with other techniques, such as reinforcement learning and contrastive state abstraction, to improve recommendation performance. The incorporation of temporal advantage signals, interval information, and semantic IDs has also shown promise in enhancing the effectiveness of LLM-based recommender systems. Overall, the integration of LLMs in recommender systems has the potential to revolutionize the field by enabling more adaptive, semantically rich, and user-centric recommendation models. Noteworthy papers include: Agent0, which presents an LLM-driven system for automated feature discovery, and TADT-CSA, which proposes a novel Temporal Advantage Decision Transformer with Contrastive State Abstraction for generative recommendation. Additionally, the LAAC method leverages LLMs as reference policies to suggest novel items, while the IntervalLLM framework integrates interval information into LLM for sequential recommendation.

Sources

Semantic IDs for Music Recommendation

Agent0: Leveraging LLM Agents to Discover Multi-value Features from Text for Enhanced Recommendations

Improving the Performance of Sequential Recommendation Systems with an Extended Large Language Model

TADT-CSA: Temporal Advantage Decision Transformer with Contrastive State Abstraction for Generative Recommendation

Latent Inter-User Difference Modeling for LLM Personalization

A Comprehensive Review on Harnessing Large Language Models to Overcome Recommender System Challenges

Large Language Model-Enhanced Reinforcement Learning for Diverse and Novel Recommendations

Proposing a Semantic Movie Recommendation System Enhanced by ChatGPT's NLP Results

Generative Recommendation with Semantic IDs: A Practitioner's Handbook

Not Just What, But When: Integrating Irregular Intervals to LLM for Sequential Recommendation

LLM4Rail: An LLM-Augmented Railway Service Consulting Platform

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