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Jie Liu

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#artificial intelligence Preprint Sep 2026

IterSynth: Rethinking Deep Search Agents via Role-Decoupled Iterative Synthesis

Deep search requires LLM agents to decompose complex queries, search for evidence, and synthesize grounded answers, yet existing ReAct-style agents suffer from two limitations: role coupling, where one policy must handle planning, evidence use, and synthesis; and context accumulation, where growing search histories int...

Xing-Yu Wu, Yuchen Yan, Zhengxi Lu et al. · 0 citations
Aug 2026

CARE: Confidence-Aware Reasoning for Reliable Medical VQA

Reinforcement Fine-Tuning (RFT) has enabled medical Multimodal Large Language Models (MLLMs) to produce Chain-of-Thought (CoT) reasoning for visual question answering, yet these models suffer from $\textit{confidence miscalibration}$---a systematic gap between expressed certainty and actual diagnostic accuracy that und...

Yuetian Du, Yu-Cheng Wang, Zhenyuan Chen et al. · 0 citations
Preprint Aug 2026

MetaRAG: Belief-Action Aligned Policy Optimization for Agentic RAG

MetaRAG is proposed, a belief-action aligned policy optimization framework for agentic RAG that consistently improves the accuracy-efficiency trade-off over strong RL-based agentic RAG baselines, with gains that transfer to deep research settings, different optimizers, and multiple model backbones.

Qiuyi Qi, Tian Liang, Jiamu Wang et al. · 0 citations
#artificial intelligence Preprint Aug 2026

The Illusion of $\textit{What If}$: Evaluating the Breakdown of Counterfactual Reasoning in LLMs

A diagnostic benchmark for open-domain, open-form, long-horizon counterfactual causal reasoning, containing 220 what-if questions across STEM, HSS, and Hybrid scenarios, and finds that WhatIfBench remains far from saturated: even the strongest model reaches only a 64.62% final score.

Yu-Cheng Wang, Yuetian Du, Zheng Liu et al. · 0 citations
Jul 2026

Living-Harness Is an Interactive-Agent Evolver

Living-Harness is proposed, a self-evolving agent harness that converts each completed trajectory and its evaluator signals into posterior evidence for bounded harness updates, and supports retrieval-only reuse of the evolved harness state across model backbones.

Yuetian Du, Yucheng Wang, Helsing Xu et al. · 2 citations

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