Getting Started¶

When using this library, you will most likely be using the State class. This class represents the state of a quantum register. Using this class you can apply gates to the register, measure, get the state vector and things like that.

To run a simple quantum circuit, you can use something like this,

# Import QCGPU
import qcgpu

# Create a new quantum register with 2 qubits
register = qcgpu.State(2)

# Apply a hadamard (H) gate to the first qubit.
# You should note that the qubits are zero indexed
register.h(0)

# Add a controlled not (CNOT/CX) gate, with the control as
# the first qubit and target as the second.
# The register will now be in the bell state.
register.cx(0, 1)

# Perform a measurement with 1000 samples
results = register.measure(samples=1000)

# Show the results
print(results)

The output of a measurement gives a dictionary of measurement outcomes, along with how often they occurred.

{'00': 486, '11': 514}