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preliminary framework for a backend quantum provider
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algorithms, | ||
simulator, | ||
tensor_network, | ||
backend, | ||
util | ||
) | ||
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from qib.backend.quantum_provider import QuantumProvider | ||
from qib.backend.tensor_network_provider import TensorNetworkProvider |
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import abc | ||
from typing import Sequence | ||
from qib.circuit import Circuit | ||
from qib.field import Field | ||
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class QuantumProvider(abc.ABC): | ||
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@abc.abstractmethod | ||
def submit(self, circ: Circuit, fields: Sequence[Field], description): | ||
""" | ||
Submit a quantum circuit to a backend provider, | ||
returning a "job" object to query the results. | ||
""" | ||
pass | ||
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@abc.abstractmethod | ||
def query_results(self, job): | ||
""" | ||
Query results of a previously submitted job. | ||
""" | ||
pass |
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import h5py | ||
from typing import Sequence | ||
from qib.backend import QuantumProvider | ||
from qib.circuit import Circuit | ||
from qib.field import Field | ||
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class TensorNetworkProvider(QuantumProvider): | ||
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def submit(self, circ: Circuit, fields: Sequence[Field], description): | ||
""" | ||
Submit a quantum circuit to a backend provider, | ||
returning a "job" object to query the results. | ||
""" | ||
net = circ.as_tensornet(fields) | ||
# store network in a HDF5 file | ||
with h5py.File(description["filename"], "w") as f: | ||
tgrp = f.create_group("tensors") | ||
for tensor in net.net.tensors.values(): | ||
dset = tgrp.create_dataset(str(tensor.tid), data=() if tensor.tid == -1 else net.data[tensor.dataref].astype(complex)) | ||
dset.attrs["tid"] = tensor.tid | ||
dset.attrs["bids"] = tensor.bids | ||
job = { "net": net } | ||
return job | ||
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def query_results(self, job): | ||
""" | ||
Query results of a previously submitted job. | ||
""" | ||
pass |
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import numpy as np | ||
import unittest | ||
import qib | ||
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class TestBackend(unittest.TestCase): | ||
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def test_tensor_network(self): | ||
""" | ||
Test tensor network backend functionality. | ||
""" | ||
field = qib.field.Field(qib.field.ParticleType.QUBIT, qib.lattice.IntegerLattice((2,))) | ||
qa = qib.field.Qubit(field, 0) | ||
qb = qib.field.Qubit(field, 1) | ||
# Hadamard gate | ||
hadamard = qib.HadamardGate(qa) | ||
# CNOT gate | ||
cnot = qib.ControlledGate(qib.PauliXGate(qb), 1).set_control(qa) | ||
# construct a simple quantum circuit | ||
circuit = qib.Circuit() | ||
circuit.append_gate(hadamard) | ||
circuit.append_gate(cnot) | ||
self.assertTrue(circuit.fields() == [field]) | ||
h_cnot = cnot.as_matrix() @ np.kron(hadamard.as_matrix(), np.identity(2)) | ||
self.assertTrue(np.array_equal(circuit.as_matrix([field]).toarray(), h_cnot)) | ||
provider = qib.backend.TensorNetworkProvider() | ||
provider.submit(circuit, [field], { "filename": "bell_circuit_tensornet.hdf5" }) | ||
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if __name__ == "__main__": | ||
unittest.main() |