Plus-i state $\lvert i\rangle$ implementation using Qiskit. The $\lvert i\rangle$ state is prepared by applying a Hadamard gate followed by an S gate to $\lvert 0\rangle$.
from qiskit import QuantumCircuit from qiskit.quantum_info import Statevector qc = QuantumCircuit(1) qc.h(0) # |0> -> |+> qc.s(0) # |+> -> |i> = (|0> + i|1>) / sqrt(2) print(Statevector(qc)) # Statevector([0.70710678+0.j, 0.+0.70710678j], dims=(2,))