cirq-google

import cirq import cirq_google import os # Replace with your Google Cloud Project ID (e.g., 'your-project-id') # For local testing, any string can be used, but for actual hardware access, # it must be a valid GCP project ID with Quantum Engine API enabled. PROJECT_ID = os.environ.get("GOOGLE_CLOUD_PROJECT", "gcp-project-for-cirq-testing") try: # Initialize the QuantumEngine client # This assumes you have authenticated via 'gcloud auth application-default login' # or set the GOOGLE_APPLICATION_CREDENTIALS environment variable. print(f"Attempting to initialize QuantumEngine for project: {PROJECT_ID}") engine = cirq_google.QuantumEngine(project_id=PROJECT_ID) # For quickstart, we'll try to use a local simulator # For actual hardware/remote simulator usage, you would use: # processor = engine.get_processor('willow_pink') # Example processor # job = engine.run_circuit(program=circuit, processor_ids=[processor.name], repetitions=10) # results = job.results() # Define a simple circuit qubit = cirq.GridQubit(0, 0) circuit = cirq.Circuit( cirq.H(qubit), cirq.measure(qubit, key='m') ) # Run the circuit on a local Cirq simulator for quick demonstration print("Running circuit on local Cirq simulator...") simulator = cirq.Simulator() results = simulator.run(circuit, repetitions=10) print("Local simulation results:") print(results) except Exception as e: print(f"Could not initialize QuantumEngine or connect to remote resources ({e}).") print("Falling back to local Cirq simulator for demonstration.") # Define a simple circuit qubit = cirq.GridQubit(0, 0) circuit = cirq.Circuit( cirq.H(qubit), cirq.measure(qubit, key='m') ) # Run the circuit on a local Cirq simulator simulator = cirq.Simulator() results = simulator.run(circuit, repetitions=10) print("Local simulation results (fallback):") print(results)