Jingxu Xie

I am a quantitative researcher at Voleon. I completed my PhD at UC Berkeley, where I worked with Prof. Feng Wang on experimental condensed-matter physics.

My research spans machine learning and automated experimental systems, with recent work on AI agents, evaluation, and scaling laws. I am currently collaborating with Prof. Dawn Song on Agents’ Last Exam as a core contributor.

I am also exploring robot learning and sim-to-real transfer through hands-on manipulation experiments. I am interested in how learning systems generalize beyond their training data and interact with the physical world.

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Selected work

Machine learning & robotics

AgentSynth pipeline connecting task proposal, execution, verification, and task summarization.

ICLR 2026

AgentSynth: Scalable Task Generation for Generalist Computer-Use Agents

Jingxu Xie, Dylan Xu, Xuandong Zhao, Dawn Song

Generating long-horizon computer-use tasks by composing verified subtasks, with controllable difficulty for agent evaluation.

arXiv Code & data

Overview of the professional domains and task structure in Agents’ Last Exam.

Research collaboration 2026

Agents’ Last Exam (v2)

Core contributor and domain lead

A benchmark of long-horizon professional tasks with verifiable outcomes, built to evaluate agents on real-world work.

Project arXiv

ScienceIDE scientific-domain coverage and agent evaluation results on ScienceIDE-Hard.

arXiv 2026

ScienceIDE: Turning World’s Scientific Codebase into Agent Learnable Environments

Hejia Geng, Zesen Huang, …, Jingxu Xie, et al.

Turning scientific codebases into executable environments with expert-defined checks for training and evaluating scientific agents.

arXiv Project Code

A paired real and simulated SO-101 manipulation demonstration.

Independent project 2026

When Does Simulation Help Real-Robot Adaptation?

Jingxu Xie

A hands-on SO-101 manipulation study using ACT and π0.5 to explore how simulated demonstrations interact with limited real-world task coverage.

Project report

Selected workshop papers

Human scientist, repository, and planning, execution, review, and checkpoint roles in the autoresearcher workflow.

COLM LM4Sci workshop 2026

The Autoresearcher Intern: Evidence-Gated Human-AI Collaboration for Scientific Workflow Automation

Jingxu Xie

A repository-centered workflow for human–AI scientific prototyping, with evidence gates and auditable experiment records.

Cross-document linkage attacks and the LinkGuard corpus-aware defense.

COLM Re-Data workshop 2026

Pseudonymized but Linkable: Cross-Document Re-identification Risks in LLM-Ready Sensitive Text Corpora

Jingxu Xie

Studying how repeated details can link identities across pseudonymized documents, and how corpus-aware generalization can reduce that risk.

Clarify-to-Act framework comparing the expected utility of asking a question and taking an action.

COLM LSEI workshop 2026

Ask, Don't Guess: Learning When to Clarify in Situated Instruction Following

Jingxu Xie

Learning when a clarification question is worth asking by balancing useful information against interruption and error costs.

Experimental Quantum Physics

* Equal contribution

Device structure and measurements of two-component exciton condensates.

Nature 2026

Two-component exciton condensates in an electron–hole bilayer

Ruishi Qi, Qize Li, …, Jingxu Xie, et al.

Evidence for two-component exciton condensates in an electron–hole bilayer under magnetic fields.

Bilayer device structure and optical maps identifying exciton and trion populations.

Science 2025

Electrically controlled interlayer trion fluid in electron-hole bilayers

Ruishi Qi, Qize Li, Zuocheng Zhang, Sudi Chen, Jingxu Xie, et al.

Electrical control of interlayer three-particle bound states and exciton–trion mixtures in electron–hole bilayers.

arXiv

Electron–hole bilayer device, optical measurement setup, carrier-density maps, and equivalent transport circuit.

Science 2025

Perfect Coulomb drag and exciton transport in an excitonic insulator

Ruishi Qi*, Andrew Y. Joe*, Zuocheng Zhang, Jingxu Xie, et al.

Optical transport measurements reveal perfect Coulomb drag in a correlated electron–hole bilayer.

arXiv

Nonlinear optical microdevice array, device cross section, equivalent circuit, and optical activation principle.

Science Advances 2025

Femtojoule optical nonlinearity for deep learning with incoherent illumination

Qixin Feng*, Can B. Uzundal*, Ruihan Guo, Collin Sanborn, Ruishi Qi, Jingxu Xie, et al.

An energy-efficient nonlinear optical device array brings neural-network activations to computing with incoherent light.

Band alignment, device cross section, and microscope image of a WSe2 and alpha-RuCl3 heterostructure.

Nano Letters 2024

Low Resistance Contact to P-Type Monolayer WSe₂

Jingxu Xie*, Zuocheng Zhang*, Haodong Zhang*, et al.

Charge-transfer doping at a van der Waals interface enables low-resistance contacts for atomically thin p-type transistors.

arXiv

Schematic and microscopy of graphene nanoribbons grown inside hexagonal boron nitride.

Nature 2024

Graphene nanoribbons grown in hBN stacks for high-performance electronics

Bosai Lyu*, Jiajun Chen*, Sen Wang*, Shuo Lou*, Peiyue Shen*, Jingxu Xie*, Lu Qiu*, et al.

Growing long, aligned graphene nanoribbons inside hexagonal boron nitride stacks for electronic devices.

arXiv

Device geometry and remote Coulomb superlattice used to control bilayer graphene.

Nature Materials 2024

Engineering correlated insulators in bilayer graphene with a remote Coulomb superlattice

Zuocheng Zhang*, Jingxu Xie*, Wenyu Zhao, et al.

A remote charge superlattice provides a tunable route to correlated electronic states in bilayer graphene.

Atomic structure and scanning tunneling microscopy of a reconstructed moiré superlattice.

Nature Materials 2021

Imaging moiré flat bands in three-dimensional reconstructed WSe₂/WS₂ superlattices

Hongyuan Li*, Shaowei Li*, Mit H. Naik*, Jingxu Xie, et al.

Scanning tunneling microscopy connects atomic reconstruction to localized moiré flat-band states.

Scanning tunneling microscopy of correlated electron discharge cascades.

Nature Physics 2021

Imaging local discharge cascades for correlated electrons in WS₂/WSe₂ moiré superlattices

Hongyuan Li*, Shaowei Li*, Mit H. Naik, Jingxu Xie, et al.

Real-space imaging resolves local charging and discharge cascades of correlated electrons in a moiré superlattice.