Grover's oracle

Oracle_for_number5.py

from matplotlib import pyplot as plt
import numpy as np
from qiskit import *
from qiskit.tools.visualization import plot_histogram
from qiskit.tools.visualization import plot_state_city
from qiskit.providers.aer import StatevectorSimulator

# Creating quantum circuit with 3 qubits
qc = QuantumCircuit(3)

# Preparing inputs
qc.h(0)
qc.h(1)
qc.h(2)

qc.barrier()

# Oracle function for number 5 = 101
qc.x(1)
qc.h(2)
qc.ccx(0,1,2)
qc.x(1)
qc.h(2)

qc.barrier()

qc.draw(output='mpl')

backend = Aer.get_backend('statevector_simulator')
result = execute(qc, backend, shots=1024).result()
# Get the statevector from result().
statevector = result.get_statevector(qc)
plot_state_city(statevector)