Inside Baidu’s Quantum Platform: LiangYiFu 3.0 Unifies Cloud‑Native Quantum Computing

1. Overview of LiangYiFu 3.0

LiangYiFu is the world’s first cloud‑native quantum computing platform that compiles, optimizes, and executes quantum circuits from high‑level languages. It supports mobile, desktop, and cloud access, allowing users to focus on code while the platform handles routing to simulators or quantum hardware.

2. User‑Side, QaaS Layer, and Quantum Backend

The platform offers five client tiers:

QCompute SDK – expert‑level open‑source toolkit.

QComposer – beginner visual composer (WYSIWYG).

PyOnline – hobbyist web IDE.

YunlDE – enterprise containerized IDE.

QMobile – mobile outreach tool.

Each client submits circuits to the QaaS (Quantum‑as‑a‑Service) layer, which provides a unified API, scheduling, and workflow management. The QaaS routes tasks to either cloud simulators (supporting up to 63 full‑amplitude qubits) or to physical QPUs such as Baidu “QianShi” superconducting processors and other third‑party devices.

3. QCompute SDK Details

The SDK is a fully open‑source Python library that includes a high‑performance simulator, a modular plug‑in system, and support for heterogeneous backends. It abstracts quantum‑specific concepts such as qubit superposition, entanglement, and measurement, and provides a language‑independent intermediate representation that can be converted to protobuf for transmission.

4. Front‑End Development Tools

QComposer offers drag‑and‑drop circuit design with visual feedback but lacks support for variational algorithms on NISQ devices. PyOnline delivers a lightweight web IDE with pip integration, enabling rapid prototyping. YunlDE builds on code‑server to deliver a cloud‑native, containerized development environment with extensive plugin support. QMobile packages quantum capabilities into a smartphone app, allowing users to run circuits on real hardware with a single tap.

5. QaaS Scheduling and Extensible Modules

The QaaS layer unifies resource management, monitoring, and business services. It orchestrates containers, handles heterogeneous simulators, and provides modules such as Unroll (gate decomposition), Mapping (hardware‑agnostic qubit placement), and nested components to simplify algorithm development. High‑availability features include automatic drawing of circuit diagrams and LaTeX export.

6. Extensions and LiangXi Enterprise Solution

Beyond the core platform, LiangYiFu offers extension toolkits for quantum noise mitigation, application plugins, quantum singular‑value transformation, blind quantum computing, and quantum networking. The LiangXi solution delivers an end‑to‑end enterprise offering with four key traits: full‑stack hardware‑software integration, flexible deployment, one‑stop industry quantumization, and a unified platform experience.