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bug fix on ibm example; new aqt example; updated the main README file (…
…#368) Co-authored-by: dbretaud <[email protected]>
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import matplotlib.pyplot as plt | ||
import getpass | ||
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from projectq import MainEngine | ||
from projectq.backends import AQTBackend | ||
from projectq.libs.hist import histogram | ||
from projectq.ops import Measure, Entangle, All | ||
import projectq.setups.aqt | ||
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def run_entangle(eng, num_qubits=3): | ||
""" | ||
Runs an entangling operation on the provided compiler engine. | ||
Args: | ||
eng (MainEngine): Main compiler engine to use. | ||
num_qubits (int): Number of qubits to entangle. | ||
Returns: | ||
measurement (list<int>): List of measurement outcomes. | ||
""" | ||
# allocate the quantum register to entangle | ||
qureg = eng.allocate_qureg(num_qubits) | ||
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# entangle the qureg | ||
Entangle | qureg | ||
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# measure; should be all-0 or all-1 | ||
All(Measure) | qureg | ||
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# run the circuit | ||
eng.flush() | ||
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# access the probabilities via the back-end: | ||
# results = eng.backend.get_probabilities(qureg) | ||
# for state in results: | ||
# print("Measured {} with p = {}.".format(state, results[state])) | ||
# or plot them directly: | ||
histogram(eng.backend, qureg) | ||
plt.show() | ||
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# return one (random) measurement outcome. | ||
return [int(q) for q in qureg] | ||
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if __name__ == "__main__": | ||
#devices available to subscription: | ||
# aqt_simulator (11 qubits) | ||
# aqt_simulator_noise (11 qubits) | ||
# aqt_device (4 qubits) | ||
# | ||
# To get a subscription, create a profile at : | ||
# https://gateway-portal.aqt.eu/ | ||
# | ||
device = None # replace by the AQT device name you want to use | ||
token = None # replace by the token given by AQT | ||
if token is None: | ||
token = getpass.getpass(prompt='AQT token > ') | ||
if device is None: | ||
device = getpass.getpass(prompt='AQT device > ') | ||
# create main compiler engine for the AQT back-end | ||
eng = MainEngine(AQTBackend(use_hardware=True, token=token, num_runs=200, | ||
verbose=False, device=device), | ||
engine_list=projectq.setups.aqt.get_engine_list( | ||
token=token, device=device)) | ||
# run the circuit and print the result | ||
print(run_entangle(eng)) |
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