Documentation
How it actually works
Written against the real, shipped source, every equation, code excerpt, and number here is either derived on the page or pulled directly from the repository it describes.
QP-Core: Transpiler Pipeline
How an OpenQASM 2/3 circuit becomes Amazon Braket IR, parsing, Qiskit's optimization passes, and IR emission.
VQE Suite: Hamiltonian & Ansatz
The H2 second quantized Hamiltonian, its Jordan-Wigner reduced 2-qubit form, and why the minimal ansatz circuit is exact for this problem.
VQE Suite: State Representations & Measurement
How the ansatz statevector's amplitudes become measurement probabilities, why its reduced single qubit state is mixed, and how a real projective measurement is sampled.
VQE Suite: Zero Noise Extrapolation
Depolarizing noise, digital gate folding, and Richardson extrapolation, with real numbers from the shipped implementation.