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Large Language Models (LLMs) demonstrate strong reasoning abilities but face limitations such as hallucinations and outdated knowledge. Knowledge Graph (KG)-based Retrieval-Augmented Generation (RAG) addresses these issues by grounding LLM…

Computation and Language · Computer Science 2025-03-04 Mufei Li , Siqi Miao , Pan Li

Large Language Models (LLMs) and Knowledge Graphs (KGs) offer a promising approach to robust and explainable Question Answering (QA). While LLMs excel at natural language understanding, they suffer from knowledge gaps and hallucinations.…

Machine Learning · Computer Science 2025-04-15 Jasper Linders , Jakub M. Tomczak

Large language models (LLMs) frequently generate confident yet factually incorrect content when used for language generation (a phenomenon often known as hallucination). Retrieval augmented generation (RAG) tries to reduce factual errors by…

Information Retrieval · Computer Science 2026-04-01 Dobrik Georgiev , Kheeran Naidu , Alberto Cattaneo , Federico Monti , Carlo Luschi , Daniel Justus

As large language models (LLMs) continue to grow in size, their abilities to tackle complex tasks have significantly improved. However, issues such as hallucination and the lack of up-to-date knowledge largely remain unresolved. Knowledge…

Artificial Intelligence · Computer Science 2026-03-17 Lihui Liu

Large Language Models (LLMs) have demonstrated significant potential across various domains. However, they often struggle with integrating external knowledge and performing complex reasoning, leading to hallucinations and unreliable…

Machine Learning · Computer Science 2025-11-25 Yao Cheng , Yibo Zhao , Jiapeng Zhu , Yao Liu , Xing Sun , Xiang Li

Ensuring factual accuracy while maintaining the creative capabilities of Large Language Model Agents (LMAs) poses significant challenges in the development of intelligent agent systems. LMAs face prevalent issues such as information…

Artificial Intelligence · Computer Science 2024-05-21 Diego Sanmartin

While Large Language Models (LLMs) demonstrate exceptional performance in a multitude of Natural Language Processing (NLP) tasks, they encounter challenges in practical applications, including issues with hallucinations, inadequate…

Computation and Language · Computer Science 2024-06-13 Yihao Li , Ru Zhang , Jianyi Liu

Graph Retrieval-Augmented Generation (GraphRAG) has become a common approach for multi-hop reasoning by using knowledge graphs (KGs) as structured retrieval indexes. However, most existing GraphRAG methods implicitly assume that…

Information Retrieval · Computer Science 2026-05-20 Yizhuo Ma , Jinchuan Xu , Tao Wen , Qizhi Chen , Jiakai Li , Rongzheng Wang , Muquan Li , Shuang Liang , Ke Qin

Large language models (LLMs) still struggle with multi-hop reasoning over knowledge-graphs (KGs), and we identify a previously overlooked structural reason for this difficulty: Transformer attention heads naturally specialize in distinct…

Computation and Language · Computer Science 2026-04-15 Jinliang Liu , Jiale Bai , Shaoning Zeng

Large language models (LLMs) have demonstrated impressive reasoning abilities in complex tasks. However, they lack up-to-date knowledge and experience hallucinations during reasoning, which can lead to incorrect reasoning processes and…

Computation and Language · Computer Science 2024-02-27 Linhao Luo , Yuan-Fang Li , Gholamreza Haffari , Shirui Pan

Large Language Models (LLMs) have demonstrated remarkable capabilities in natural language understanding and generation. However, they often struggle with complex reasoning tasks and are prone to hallucination. Recent research has shown…

Computation and Language · Computer Science 2024-12-17 Xue Wu , Kostas Tsioutsiouliklis

Large language models (LLMs) have demonstrated remarkable capabilities across various domains, although their susceptibility to hallucination poses significant challenges for their deployment in critical areas such as healthcare. To address…

Computation and Language · Computer Science 2024-05-13 Mengjia Niu , Hao Li , Jie Shi , Hamed Haddadi , Fan Mo

Large language models have shown remarkable language processing and reasoning ability but are prone to hallucinate when asked about private data. Retrieval-augmented generation (RAG) retrieves relevant data that fit into an LLM's context…

Machine Learning · Computer Science 2025-11-13 Alfred Clemedtson , Borun Shi

Large language models (LLMs) have shown strong potential across a variety of tasks, but their application in the telecom field remains challenging due to domain complexity, evolving standards, and specialized terminology. Therefore,…

Artificial Intelligence · Computer Science 2026-02-20 Dun Yuan , Hao Zhou , Xue Liu , Hao Chen , Yan Xin , Jianzhong , Zhang

Incorporating factual knowledge in knowledge graph is regarded as a promising approach for mitigating the hallucination of large language models (LLMs). Existing methods usually only use the user's input to query the knowledge graph, thus…

Computation and Language · Computer Science 2023-11-23 Xinyan Guan , Yanjiang Liu , Hongyu Lin , Yaojie Lu , Ben He , Xianpei Han , Le Sun

Knowledge Graphs (KGs) represent human-crafted factual knowledge in the form of triplets (head, relation, tail), which collectively form a graph. Question Answering over KGs (KGQA) is the task of answering natural questions grounding the…

Computation and Language · Computer Science 2024-05-31 Costas Mavromatis , George Karypis

Retrieval-Augmented Generation (RAG) has significantly mitigated the hallucinations of Large Language Models (LLMs) by grounding the generation with external knowledge. Recent extensions of RAG to graph-based retrieval offer a promising…

Machine Learning · Computer Science 2025-09-23 Jialin Chen , Houyu Zhang , Seongjun Yun , Alejandro Mottini , Rex Ying , Xiang Song , Vassilis N. Ioannidis , Zheng Li , Qingjun Cui

Retrieval-Augmented Generation (RAG) mitigates hallucination in Large Language Models (LLMs) by incorporating external data, with Knowledge Graphs (KGs) offering crucial information for question answering. Traditional Knowledge Graph…

Computation and Language · Computer Science 2025-09-08 Yushi Sun , Kai Sun , Yifan Ethan Xu , Xiao Yang , Xin Luna Dong , Nan Tang , Lei Chen

Large Language Models (LLMs) have achieved impressive capabilities in language understanding and generation, yet they continue to underperform on knowledge-intensive reasoning tasks due to limited access to structured context and multi-hop…

Computation and Language · Computer Science 2025-06-26 Travis Thompson , Seung-Hwan Lim , Paul Liu , Ruoying He , Dongkuan Xu

Graph-based retrieval-augmented generation (Graph-based RAG) has demonstrated significant potential in enhancing Large Language Models (LLMs) with structured knowledge. However, existing methods face three critical challenges: Inaccurate…

Machine Learning · Computer Science 2026-03-18 Yubo Wang , Haoyang Li , Fei Teng , Lei Chen
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