File DDMinimizer.hpp

namespace ddsim

class DDMinimizer

#include <DDMinimizer.hpp>

Select a qubit order for ideal state-vector simulation with CircuitSimulator.

Public Static Functions

static void optimizeInputPermutation(qc::QuantumComputation &circuit)

Change only the circuit’s input layout to the control-dependency order.

Operations, registers, and the output permutation are preserved. This assumes the permutation-invariant all-zero input and a simulator that tracks layouts, such as CircuitSimulator. It is not supported by the noise, hybrid, or path simulators.

static qc::Permutation createGateBasedPermutation(const qc::QuantumComputation &circuit)

Return a physical-qubit-to-DD-level mapping with targets below controls.

Standard controlled gates contribute dependencies, including gates in compound operations. Controlled-Z gates and classically controlled operations are ignored. Ties preserve the existing logical qubit order. Cycles, empty circuits, and circuits with ancillary or garbage qubits retain their input layout. The heuristic does not guarantee a smaller DD.