Deutsch–Jozsa single bit code

Deutsch–Jozsa_one_bit.py

from matplotlib import pyplot as plt
import numpy as np
from qiskit import *
from qiskit.tools.visualization import plot_histogram

# Creating a circuit with 3 quantum bits and 2 classical bit
qc = QuantumCircuit(2,1)

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

qc.barrier()

# Oracle function 1

# Oracle function 2
#qc.x(1)

# Oracle function 3
#qc.cx(0,1)

# Oracle function 4
#qc.cx(0,1)
#qc.x(1)

qc.barrier()

# Preparing output
qc.h(0)

qc.barrier()

# measuring the results
qc.measure(0,0)

qc.draw(output='mpl')

# Running the experiment in simulator
simulator = Aer.get_backend('qasm_simulator')
result = execute(qc,backend=simulator,shots=1024).result()
plot_histogram(result.get_counts())