zenDot：一款集成大语言模型（LLM）的量子TCAD平台，用于半导体量子器件设计与优化自动化
zenDot: An LLM-integrated quantum TCAD platform for semiconductor quantum-device design and optimization automation
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中文总结 AI 辅助
zenDot是集成LLM的量子TCAD平台，可连接器件物理与LLM驱动的设计探索，在Si/SiO₂双量子点验证中完成18次设计迭代，将最差门保真度降低近30倍。
中文摘要 AI 辅助
半导体量子器件设计仍缺乏一种类似集成化技术计算机辅助设计（TCAD）的环境，该环境需连接材料几何结构、量子多体模拟与自动化设计。本文介绍zenDot，一款集成大语言模型（LLM）的量子TCAD平台，它将材料标注的器件状态与统一的凝聚态物理工具箱相连接。器件与计算组件被整合为桌面工作台、Python API及嵌入式LLM智能体，使静电学、电荷与输运表征、关联态计算及量子比特建模可在一个可复现的环境中执行。我们在Si/SiO₂双量子点上验证zenDot，单个器件状态可复现表征工作流并支持混合、隧穿电荷及单重态-三重态量子比特分析。平台级通用控制扫描修正了单重态-三重态工作点，使预测的最差门保真度降低近30倍。除分析外，LLM智能体可像人类用户一样直接操作同一物理环境，提出设计变更、执行已注册模拟并在物理感知验证下迭代求解器返回的指标。在三个演示任务中，它完成了18次经过验证的设计迭代，包括几何修改及随后从材料堆叠开始的完整重求解。zenDot建立了一种机器可操作的量子TCAD工作流，将器件物理与LLM驱动的设计探索相连接。
英文摘要
Semiconductor quantum-device design still lacks an integrated Technology Computer-Aided Design (TCAD)-like environment that connects material geometry, quantum many-body simulation, and automated design. Here we introduce zenDot, a large-language model (LLM)-integrated quantum TCAD platform that links a material-labelled device state to a unified condensed-matter physics toolbox. The device and calculation components are integrated into a desktop workbench, Python API, and an embedded LLM agent, allowing electrostatics, charge and transport characterization, correlated-state calculations, and qubit modelling to be executed within one reproducible environment. We demonstrate zenDot on a Si/SiO2 double quantum dot, where a single device state reproduces the characterization workflow and supports hybrid, tunnel-charge, and singlet-triplet qubit analyses. A platform-level universal-control scan revises the singlet-triplet operating point and reduces the predicted worst-gate infidelity by nearly 30-fold. Beyond analysis, the LLM agent directly operates the same physics environment as human users, proposing design changes, executing registered simulations, and iterating on solver-returned metrics under physics-aware validation. Across three demonstration tasks it completes 18 validated design iterations, including geometry modification followed by a full re-solve from the material stack. zenDot establishes a machine-operable quantum TCAD workflow that connects device physics with LLM-driven design exploration.
