QuantumForge

QuantumForge is a quantum-circuit simulator I wrote in Rust, with ndarray holding the state and rayon applying gates in parallel, and a Python bridge so Qiskit circuits can run on it. On random circuits it was about 4,000 times faster than a naive NumPy simulator at 16 qubits, and faster than Qiskit Aer on CPU up to about 18 qubits. Beyond that Aer pulls ahead, by about four times at 26 qubits, the largest state (512 MB) I ran on a 48 GB machine. I also compared VQE with an evolutionary GQE on H₂. The Rust VQE finished within 1.1 × 10⁻⁶ hartree of the exact ground-state energy, and the GQE within 10⁻¹³.