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A python framework for creating, editing, and invoking Noisy Intermediate Scale Quantum (NISQ) circuits.

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Cirq

Cirq is a Python library for writing, manipulating, and optimizing quantum circuits and running them against quantum computers and simulators.

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Installation

Follow these instructions.

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.from_ops(
    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.google.XmonSimulator()
result = simulator.run(circuit, repetitions=20)
print("Results:")
print(result)

Example output:

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

Documentation

See here or jump into the tutorial.

Contributing

We welcome contributions. Please follow these guidelines.

See Also

For those interested in using quantum computers to solve problems in chemistry and materials science, we encourage exploring OpenFermion and its sister library for compiling quantum simulation algorithms in Cirq, OpenFermion-Cirq.

Disclaimer

Copyright 2018 The Cirq Developers. This is not an official Google product.

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A python framework for creating, editing, and invoking Noisy Intermediate Scale Quantum (NISQ) circuits.

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