ffsim.qiskit.final_state_vector¶

ffsim.qiskit.final_state_vector(circuit, norb=None, nelec=None)[source]¶

Return the final state vector of a fermionic quantum circuit.

Parameters:

norb (int | None) – The number of spatial orbitals.
nelec (int | tuple[int, int] | None) – Either a single integer representing the number of fermions for a spinless system, or a pair of integers storing the numbers of spin alpha and spin beta fermions.
circuit (QuantumCircuit) – The circuit composed of fermionic gates.

Return type:

StateVector

Returns:

The final state vector that results from applying the circuit to the vacuum state.