How To: Create Quantum Registers

To create a quantum register in QLeap, you can either use the QState class to create a quantum register with a specified number of qubits, or you can create individual Qubit instances.

from qleap import Circuit, QState, Qubit, Measurement

# Create a quantum register with 3 qubits
qreg = QState(3)

# Alternatively, create individual qubits
q1 = Qubit()
q2 = Qubit()
q3 = Qubit()

# Measure the quantum register
Measurement(qreg)

# Run the quantum program
Circuit.run()

# Print the measurement result
print(f'Measurement result: {Circuit.get_results()}')

In this code, we create a quantum register with 3 qubits using the QState class. This allows us to represent multiple qubits as a single entity, which can be useful for applying gates and measurements to multiple qubits at once. Alternatively, we can create individual Qubit instances for each qubit we want to use in our quantum program. This gives us more flexibility to manipulate each qubit separately. Finally, we measure the quantum register, run the quantum program, and print the measurement result. The results, if working correctly, should all be 0 since the qubits are initialized in the \(\ket{0}\) state by default.