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This paper describes a compact and effective model for low-latency passage retrieval in conversational search based on learned dense representations. Prior to our work, the state-of-the-art approach uses a multi-stage pipeline comprising…

Information Retrieval · Computer Science 2021-11-30 Sheng-Chieh Lin , Jheng-Hong Yang , Jimmy Lin

Large language models (LLMs) have transformed AI research thanks to their powerful internal capabilities and knowledge. However, existing LLMs still fail to effectively incorporate the massive external knowledge when interacting with the…

Computation and Language · Computer Science 2026-04-15 Tao Feng , Pengrui Han , Guanyu Lin , Ge Liu , Jiaxuan You

LLM-based conversational AI agents struggle to maintain coherent behavior over long horizons due to limited context. While RAG-based approaches are increasingly adopted to overcome this limitation by storing interactions in external memory…

Artificial Intelligence · Computer Science 2026-05-13 Jiazhou Liang , Armin Toroghi , Yifan Simon Liu , Faeze Moradi Kalarde , Liam Gallagher , Scott Sanner

Translating conversational text, particularly in customer support contexts, presents unique challenges due to its informal and unstructured nature. We propose a context-aware LLM translation system that leverages conversation summarization…

Computation and Language · Computer Science 2024-10-23 Mingi Sung , Seungmin Lee , Jiwon Kim , Sejoon Kim

Conversational agents leveraging AI, particularly deep learning, are emerging in both academic research and real-world applications. However, these applications still face challenges, including disrespecting knowledge and facts, not…

Computation and Language · Computer Science 2025-03-25 Junfeng Liu , Zhuocheng Mei , Kewen Peng , Ranga Raju Vatsavai

Memory is critical for enabling large language model (LLM) based agents to maintain coherent behavior over long-horizon interactions. However, existing agent memory systems suffer from two key gaps: they rely on a one-size-fits-all memory…

Artificial Intelligence · Computer Science 2026-02-17 Mingfei Lu , Mengjia Wu , Feng Liu , Jiawei Xu , Weikai Li , Haoyang Wang , Zhengdong Hu , Ying Ding , Yizhou Sun , Jie Lu , Yi Zhang

Large Language Model (LLM) has exhibited strong reasoning ability in text-based contexts across various domains, yet the limitation of context window poses challenges for the model on long-range inference tasks and necessitates a memory…

Information Retrieval · Computer Science 2026-03-11 Mengwei Yuan , Jianan Liu , Jing Yang , Xianyou Li , Weiran Yan , Yichao Wu , Penghao Liang

Reasoning over very long inputs remains difficult for large language models (LLMs). Common workarounds either shrink the input via retrieval (risking missed evidence), enlarge the context window (straining selectivity), or stage multiple…

LLM-based conversational agents still struggle to maintain coherent, personalized interaction over many sessions: fixed context windows limit how much history can be kept in view, and most external memory approaches trade off between coarse…

Computation and Language · Computer Science 2025-12-12 Sizhe Zhou , Jiawei Han

Large language model (LLM) agents increasingly operate in settings where a single context window is far too small to capture what has happened, what was learned, and what should not be repeated. Memory -- the ability to persist, organize,…

Artificial Intelligence · Computer Science 2026-03-10 Pengfei Du

Large Language Models (LLMs) struggle to handle long input sequences due to high memory and runtime costs. Memory-augmented models have emerged as a promising solution to this problem, but current methods are hindered by limited memory…

Computation and Language · Computer Science 2024-02-22 Zexue He , Leonid Karlinsky , Donghyun Kim , Julian McAuley , Dmitry Krotov , Rogerio Feris

Large Language Models (LLMs) have shown strong potential as conversational agents. Yet, their effectiveness remains limited by deficiencies in robust long-term memory, particularly in complex, long-term web-based services such as online…

Computation and Language · Computer Science 2026-02-03 Tiantian Chen , Jiaqi Lu , Ying Shen , Lin Zhang

Evaluating the abilities of large language models (LLMs) for tasks that require long-term memory and thus long-context reasoning, for example in conversational settings, is hampered by the existing benchmarks, which often lack narrative…

Computation and Language · Computer Science 2026-02-24 Mohammad Tavakoli , Alireza Salemi , Carrie Ye , Mohamed Abdalla , Hamed Zamani , J Ross Mitchell

Large language models (LLMs) are increasingly deployed as intelligent agents that reason, plan, and interact with their environments. To effectively scale to long-horizon scenarios, a key capability for such agents is a memory mechanism…

Artificial Intelligence · Computer Science 2026-01-09 Yuyang Hu , Jiongnan Liu , Jiejun Tan , Yutao Zhu , Zhicheng Dou

Computational resource constraints on edge devices make it difficult to develop a fully embedded AI companion system with a satisfactory user experience. AI companion and memory systems detailed in existing literature cannot be directly…

Artificial Intelligence · Computer Science 2026-01-14 Rahul Gupta , Stephen D. H. Hsu

Long-term conversational agents require effective memory management to handle dialogue histories that exceed the context window of large language models (LLMs). Existing methods based on fact extraction or summarization reduce redundancy…

Computation and Language · Computer Science 2025-09-26 Yaxiong Wu , Yongyue Zhang , Sheng Liang , Yong Liu

Large language models (LLMs) struggle with maintaining coherence in extended conversations spanning hundreds of turns, despite performing well within their context windows. This paper introduces HEMA (Hippocampus-Inspired Extended Memory…

Computation and Language · Computer Science 2025-04-24 Kwangseob Ahn

Long-term memory is one of the key factors influencing the reasoning capabilities of Large Language Model Agents (LLM Agents). Incorporating a memory mechanism that effectively integrates past interactions can significantly enhance…

Computation and Language · Computer Science 2025-08-01 Haoran Sun , Shaoning Zeng

While large language model (LLM) agents can effectively use external tools for complex real-world tasks, they require memory systems to leverage historical experiences. Current memory systems enable basic storage and retrieval but lack…

Computation and Language · Computer Science 2025-10-09 Wujiang Xu , Zujie Liang , Kai Mei , Hang Gao , Juntao Tan , Yongfeng Zhang

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…