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Related papers: Query Expansion in the Age of Pre-trained and Larg…

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With the breakthroughs in large language models (LLMs), query generation techniques that expand documents and queries with related terms are becoming increasingly popular in the information retrieval field. Such techniques have been shown…

Information Retrieval · Computer Science 2025-07-16 Adam Yang , Gustavo Penha , Enrico Palumbo , Hugues Bouchard

Query expansion is the reformulation of a user query by adding semantically related information, and is an essential component of monolingual and cross-lingual information retrieval used to ensure that relevant documents are not missed.…

Information Retrieval · Computer Science 2025-11-25 Olivia Macmillan-Scott , Roksana Goworek , Eda B. Özyiğit

Query expansion (QE) enhances retrieval by incorporating relevant terms, with large language models (LLMs) offering an effective alternative to traditional rule-based and statistical methods. However, LLM-based QE suffers from a fundamental…

Information Retrieval · Computer Science 2025-05-20 Kenya Abe , Kunihiro Takeoka , Makoto P. Kato , Masafumi Oyamada

The vocabulary mismatch problem is one of the important challenges facing traditional keyword-based Information Retrieval Systems. The aim of query expansion (QE) is to reduce this query-document mismatch by adding related or synonymous…

Information Retrieval · Computer Science 2015-09-21 Dipasree Pal , Mandar Mitra , Samar Bhattacharya

Recent studies demonstrate that query expansions generated by large language models (LLMs) can considerably enhance information retrieval systems by generating hypothetical documents that answer the queries as expansions. However,…

Information Retrieval · Computer Science 2024-02-29 Yibin Lei , Yu Cao , Tianyi Zhou , Tao Shen , Andrew Yates

Query expansion is a widely used technique to improve the recall of search systems. In this paper, we propose an approach to query expansion that leverages the generative abilities of Large Language Models (LLMs). Unlike traditional query…

Information Retrieval · Computer Science 2023-05-08 Rolf Jagerman , Honglei Zhuang , Zhen Qin , Xuanhui Wang , Michael Bendersky

Query expansion is an effective approach for mitigating vocabulary mismatch between queries and documents in information retrieval. One recent line of research uses language models to generate query-related contexts for expansion. Along…

Computation and Language · Computer Science 2022-10-14 Linqing Liu , Minghan Li , Jimmy Lin , Sebastian Riedel , Pontus Stenetorp

With the ever increasing size of the web, relevant information extraction on the Internet with a query formed by a few keywords has become a big challenge. Query Expansion (QE) plays a crucial role in improving searches on the Internet.…

Information Retrieval · Computer Science 2019-06-21 Hiteshwar Kumar Azad , Akshay Deepak

Effective query expansion for web search benefits from promoting both exploration and result diversity to capture multiple interpretations and facets of a query. While recent LLM-based methods have improved retrieval performance and…

Information Retrieval · Computer Science 2026-03-11 Yibin Lei , Tao Shen , Andrew Yates

Query expansion has been employed for a long time to improve the accuracy of query retrievers. Earlier works relied on pseudo-relevance feedback (PRF) techniques, which augment a query with terms extracted from documents retrieved in a…

Information Retrieval · Computer Science 2024-06-12 Muhammad Shihab Rashid , Jannat Ara Meem , Yue Dong , Vagelis Hristidis

Large Language Models (LLMs) are now widely used for query reformulation and expansion in Information Retrieval, with many studies reporting substantial effectiveness gains. However, these results are typically obtained under heterogeneous…

Information Retrieval · Computer Science 2026-05-01 Amin Bigdeli , Radin Hamidi Rad , Hai Son Le , Mert Incesu , Negar Arabzadeh , Charles L. A. Clarke , Ebrahim Bagheri

Query Optimization (QO) has become essential for enhancing Large Language Model (LLM) effectiveness, particularly in Retrieval-Augmented Generation (RAG) systems where query quality directly determines retrieval and response performance.…

Computation and Language · Computer Science 2026-03-04 Mingyang Song , Mao Zheng

Query Expansion (QE) improves retrieval performance by enriching queries with related terms. Recently, Large Language Models (LLMs) have been used for QE, but existing methods face a trade-off: generating diverse terms boosts performance…

Information Retrieval · Computer Science 2025-09-03 Jinseok Kim , Sukmin Cho , Soyeong Jeong , Sangyeop Kim , Sungzoon Cho

As the applications of large language models (LLMs) expand across diverse fields, the ability of these models to adapt to ongoing changes in data, tasks, and user preferences becomes crucial. Traditional training methods, relying on static…

Machine Learning · Computer Science 2024-06-11 Junhao Zheng , Shengjie Qiu , Chengming Shi , Qianli Ma

Large Language Models (LLMs) are foundational in language technologies, particularly in information retrieval (IR). Previous studies have utilized LLMs for query expansion, achieving notable improvements in IR. In this paper, we thoroughly…

Information Retrieval · Computer Science 2024-07-02 Le Zhang , Yihong Wu , Qian Yang , Jian-Yun Nie

Using large language models (LMs) for query or document expansion can improve generalization in information retrieval. However, it is unknown whether these techniques are universally beneficial or only effective in specific settings, such…

Information Retrieval · Computer Science 2024-02-28 Orion Weller , Kyle Lo , David Wadden , Dawn Lawrie , Benjamin Van Durme , Arman Cohan , Luca Soldaini

Adapting large language models (LLMs) to new and diverse knowledge is essential for their lasting effectiveness in real-world applications. This survey provides an overview of state-of-the-art methods for expanding the knowledge of LLMs,…

Computation and Language · Computer Science 2025-02-19 Mingyang Wang , Alisa Stoll , Lukas Lange , Heike Adel , Hinrich Schütze , Jannik Strötgen

Recently, large language models (LLMs) have shown remarkable capabilities including understanding context, engaging in logical reasoning, and generating responses. However, this is achieved at the expense of stringent computational and…

Computation and Language · Computer Science 2024-05-30 Xindi Wang , Mahsa Salmani , Parsa Omidi , Xiangyu Ren , Mehdi Rezagholizadeh , Armaghan Eshaghi

Large language models (LLMs) have rapidly evolved from text generators into powerful problem solvers. Yet, many open tasks demand critical thinking, multi-source, and verifiable outputs, which are beyond single-shot prompting or standard…

Large language models (LLMs) exhibit superior performance on various natural language tasks, but they are susceptible to issues stemming from outdated data and domain-specific limitations. In order to address these challenges, researchers…

Computation and Language · Computer Science 2024-10-24 Zhangyin Feng , Weitao Ma , Weijiang Yu , Lei Huang , Haotian Wang , Qianglong Chen , Weihua Peng , Xiaocheng Feng , Bing Qin , Ting liu
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