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Retrieval-Augmented Generation (RAG) systems for Large Language Models (LLMs) hold promise in knowledge-intensive tasks but face limitations in complex multi-step reasoning. While recent methods have integrated RAG with chain-of-thought…

Computation and Language · Computer Science 2025-01-15 Zhongxiang Sun , Qipeng Wang , Weijie Yu , Xiaoxue Zang , Kai Zheng , Jun Xu , Xiao Zhang , Song Yang , Han Li

Retrieval-Augmented Generation (RAG) mitigates key limitations of Large Language Models (LLMs)-such as factual errors, outdated knowledge, and hallucinations-by dynamically retrieving external information. Recent work extends this paradigm…

Computation and Language · Computer Science 2026-05-22 Jingru Lin , Chen Zhang , Stephen Y. Liu , Haizhou Li

Effective decision-making in the real world depends on memory that is both stable and adaptive: environments change over time, and agents must retain relevant information over long horizons while also updating or overwriting outdated…

Machine Learning · Computer Science 2026-01-22 Oleg Shchendrigin , Egor Cherepanov , Alexey K. Kovalev , Aleksandr I. Panov

During the last years, there has been a lot of interest in achieving some kind of complex reasoning using deep neural networks. To do that, models like Memory Networks (MemNNs) have combined external memory storages and attention…

Computation and Language · Computer Science 2018-05-25 Juan Pavez , Héctor Allende , Héctor Allende-Cid

We introduce Rank1, the first reranking model trained to take advantage of test-time compute. Rank1 demonstrates the applicability within retrieval of using a reasoning language model (i.e. OpenAI's o1, Deepseek's R1, etc.) for distillation…

Information Retrieval · Computer Science 2025-08-11 Orion Weller , Kathryn Ricci , Eugene Yang , Andrew Yates , Dawn Lawrie , Benjamin Van Durme

In this paper, we introduce Rank-R1, a novel LLM-based reranker that performs reasoning over both the user query and candidate documents before performing the ranking task. Existing document reranking methods based on large language models…

Information Retrieval · Computer Science 2025-03-11 Shengyao Zhuang , Xueguang Ma , Bevan Koopman , Jimmy Lin , Guido Zuccon

Large language models often expose their brittleness in reasoning tasks, especially while executing long chains of reasoning over context. We propose MemReasoner, a new and simple memory-augmented LLM architecture, in which the memory…

Computation and Language · Computer Science 2025-03-12 Payel Das , Ching-Yun Ko , Sihui Dai , Georgios Kollias , Subhajit Chaudhury , Aurelie Lozano

We describe ConvMemory, a small 3.6M-parameter learned reranker for conversational long-term memory retrieval, trained with cross-encoder teacher supervision over fused dense and lexical features. On the LongMemEval memory family,…

Computation and Language · Computer Science 2026-05-28 Taiheng Pan

Memory-augmented LLM agents maintain external memory banks to support long-horizon interaction, yet most existing systems treat construction, retrieval, and utilization as isolated subroutines. This creates two coupled challenges: strategic…

Artificial Intelligence · Computer Science 2026-03-20 Minhua Lin , Zhiwei Zhang , Hanqing Lu , Hui Liu , Xianfeng Tang , Qi He , Xiang Zhang , Suhang Wang

Large language model (LLM) based listwise reranking has emerged as the dominant paradigm for achieving state-of-the-art ranking effectiveness in information retrieval. However, its reliance on feeding full passage texts into the LLM…

Information Retrieval · Computer Science 2026-04-27 Xiaojie Ke , Shuai Zhang , Liansheng Sun , Yongjin Wang , Hengjun Jiang , Xiangkun Liu , Cunxin Gu , Jian Xu , Guanjun Jiang

Retrieve-and-rerank is a prevalent framework in neural information retrieval, wherein a bi-encoder network initially retrieves a pre-defined number of candidates (e.g., K=100), which are then reranked by a more powerful cross-encoder model.…

Information Retrieval · Computer Science 2024-05-29 Revanth Gangi Reddy , Pradeep Dasigi , Md Arafat Sultan , Arman Cohan , Avirup Sil , Heng Ji , Hannaneh Hajishirzi

Reranking documents based on their relevance to a given query is a critical task in information retrieval. Traditional reranking methods often lack transparency and rely on proprietary models, hindering reproducibility and interpretability.…

Computation and Language · Computer Science 2025-04-15 Yuelyu Ji , Zhuochun Li , Rui Meng , Daqing He

The evolution of recommender systems has shifted from traditional collaborative filtering to LLM-based agentic systems, which rely on semantic user and item memories to make predictions. However, existing agents maintain these memories in…

Information Retrieval · Computer Science 2026-04-29 Weixin Chen , Yuhan Zhao , Jingyuan Huang , Zihe Ye , Clark Mingxuan Ju , Tong Zhao , Neil Shah , Li Chen , Yongfeng Zhang

Recent benchmarks for Large Language Model (LLM) agents mainly evaluate reasoning, planning, and execution. However, memory is also essential for agents, as it enables them to store, update, and retrieve information over time. This ability…

Computation and Language · Computer Science 2026-05-19 Yuyao Wang , Zhongjian Zhang , Mo Chi , Kaichi Yu , Yuhan Li , Miao Peng , Bing Tong , Chen Zhang , Yan Zhou , Jia Li

Despite rapid progress in large-scale language and vision models, AI agents still suffer from a fundamental limitation: they cannot remember. Without reliable memory, agents catastrophically forget past experiences, struggle with…

Retrieval-Augmented Generation (RAG) enables Large Language Models (LLMs) to extend their existing knowledge by dynamically incorporating external information. However, practical deployment is fundamentally constrained by the LLM's finite…

Information Retrieval · Computer Science 2026-03-24 Jiarui Guo , Yuemeng Xu , Zongwei Lv , Yangyujia Wang , Xiaolin Wang , Kan Liu , Tao Lan , Lin Qu , Tong Yang

Production AI agents frequently receive user-specific queries that are highly repetitive, with up to 47\% being semantically similar to prior interactions, yet each query is typically processed with the same computational cost. We argue…

Computation and Language · Computer Science 2026-03-25 Xunzhuo Liu , Bowei He , Xue Liu , Andy Luo , Haichen Zhang , Huamin Chen

Modern language agents must operate over long-horizon, multi-turn histories, yet deploying such agents with Small Language Models (SLMs) remains fundamentally difficult. Full-context prompting causes context overflow, flat retrieval exposes…

Multiagent Systems · Computer Science 2026-05-06 Jiayi Chen , Yingcong Li , Guiling Wang

With the growing success of reasoning models across complex natural language tasks, researchers in the Information Retrieval (IR) community have begun exploring how similar reasoning capabilities can be integrated into passage rerankers…

Information Retrieval · Computer Science 2025-05-23 Nour Jedidi , Yung-Sung Chuang , James Glass , Jimmy Lin

Memory is a central capability for LLM agents operating across long-horizon tasks. Existing memory benchmarks predominantly evaluate retention of personalized information in multi-turn chat scenarios, overlooking the dynamic memory…

Computation and Language · Computer Science 2026-05-21 Wujiang Xu , Yu Wang , Kai Mei , Kaiqu Liang , Zhenting Wang , Mingyu Jin , Han Zhang , Shi-Xiong Zhang , Wenyue Hua , Sambit Sahu , Dimitris N. Metaxas