start.md

Hello Qubit

A simple example to get you up and running:

  import cirq

  # Pick a qubit.
  qubit = cirq.GridQubit(0, 0)

  # Create a circuit
  circuit = cirq.Circuit(
      cirq.X(qubit)**0.5,  # Square root of NOT.
      cirq.measure(qubit, key='m')  # Measurement.
  )
  print("Circuit:")
  print(circuit)

  # Simulate the circuit several times.
  simulator = cirq.Simulator()
  result = simulator.run(circuit, repetitions=20)
  print("Results:")
  print(result)

Example output:

  Circuit:
  (0, 0): ───X^0.5───M('m')───
  Results:
  m=11000111111011001000

Learn more about quantum computing

In case you would like to learn more about Quantum Computing, check out our education page.

Hardware vs simulation

There are two main ways of running quantum algorithms using Cirq:

• Simulation is available on any computer
• Quantum processors are provided by different Quantum Service Providers:
  • Google Quantum Computing Service
  • Alpine Quantum Technologies
  • Pasqal