Hello World Program

This is a simple program for beginners demonstrating superpositioning.

Download: Here

What does it do

This program creates a circuit consisting of 1 qubit.

Once initialised a Hadamard (H) operation is applied to the qubit effectively putting it in to a superposition of 1 and 0.

After this the qubit is measured which collapses the qubits state to either 1 or 0.

Circuit Diagram of the program

Circuit Diagram of the program

Device used

The ibmq_qasm_simulator is used which simulates a real quantum device. Note that results from this simulator contain no errors unlike on the real quantum devices which are fairly noisy.

Note: This program requires that you have an API token. To get one sign up to IBM Q Experience and get your token here: https://quantum-computing.ibm.com/account

Source

from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit, execute, IBMQ
IBMQ.enable_account('Insert account token here') # Get this from your IBM Q account
provider = IBMQ.get_provider(hub='ibm-q')
q = QuantumRegister(1,'q') # Initialise quantum register
c = ClassicalRegister(1,'c') # Initialise classical register
circuit = QuantumCircuit(q,c) # Initialise circuit
circuit.h(q[0]) # Put Qubit 0 in to superposition using hadamard gate 
circuit.measure(q,c) # Measure qubit
backend = provider.get_backend('ibmq_qasm_simulator') # Set device to IBMs quantum simulator
job = execute(circuit, backend, shots=1024) # Execute job and run program 1024 times             
result = job.result() # Get result
counts = result.get_counts(circuit) # Count the number of measurements for each state
print('RESULT: ',counts) # Print result 
print('Press any key to close')
input()

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