Maestro

A unified interface for quantum circuit simulation. Write your circuit once — Maestro picks the best backend and runs it on CPU, GPU, or distributed HPC.

Features

• One API, many backends — compile from Qiskit / QASM to any supported simulator
• Automatic backend selection — a prediction engine analyzes your circuit and routes it to the fastest backend
• CPU simulation — statevector, MPS, Pauli propagation, Clifford/stabilizer
• GPU acceleration — statevector (cuStateVec), MPS (custom CUDA), tensor network, Pauli propagation
• Distributed simulation — p-block composite mode for distributed quantum computing
• Expectation values — direct observable estimation (Pauli strings) for VQA workflows
• Performance optimizations — automatic multi-threading, multi-processing, and optimized sampling

Quick Start

pip install qoro-maestro  # Linux, macOS & Windows

Or build from source:

chmod +x build.sh
./build.sh

For detailed build instructions, see INSTALL.md.

How It Works

Qiskit / QASM circuit
        ↓
Maestro Intermediate Representation
        ↓
Feature extraction  →  Prediction engine  →  Backend selection
        ↓
Execution (CPU / GPU / Distributed)

1. Ingest — accepts circuits from Qiskit or QASM
2. Convert — compiles to Maestro's intermediate representation
3. Analyze — extracts features (gate density, entanglement, locality)
4. Route — prediction engine estimates runtimes and selects the fastest backend
5. Execute — runs on the chosen backend with automatic performance tuning

Backends

Type	Backends
CPU	Statevector (Aer, QCSim), MPS, Pauli propagation, Clifford/stabilizer
GPU	Statevector (cuStateVec), MPS (CUDA), tensor network, Pauli propagation
Distributed	p-block composite simulation

Each backend is accessed through a C++ adapter that maps Maestro's IR to the simulator's native API.

Documentation

Resource	Link
Installation	INSTALL.md
Tutorial & API	TUTORIAL.md
Python examples	maestro-examples

To generate API docs with Doxygen:

cd build
cmake ..
make doc
# Opens at docs/html/index.html

Citation

@article{bertomeu2025maestro,
  title={Maestro: Intelligent Execution for Quantum Circuit Simulation},
  author={Bertomeu, Oriol and Ghayas, Hamzah and Roman, Adrian and DiAdamo, Stephen},
  organization={Qoro Quantum},
  year={2025}
}

License

GPL-3.0 — see LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html.