def test_bell_state_to_from_circuits():
"""Tests cirq.Circuit --> qiskit.QuantumCircuit --> cirq.Circuit
with a Bell state circuit.
"""
qreg = cirq.LineQubit.range(2)
cirq_circuit = cirq.Circuit(
[cirq.ops.H.on(qreg[0]), cirq.ops.CNOT.on(qreg[0], qreg[1])]
)
qiskit_circuit = to_qiskit(cirq_circuit) # Qiskit from Cirq
circuit_cirq = from_qiskit(qiskit_circuit) # Cirq from Qiskit
assert _equal(cirq_circuit, circuit_cirq)
def test_random_circuit_to_from_circuits():
"""Tests cirq.Circuit --> qiskit.QuantumCircuit --> cirq.Circuit
with a random two-qubit circuit.
"""
cirq_circuit = cirq.testing.random_circuit(
qubits=2, n_moments=10, op_density=0.99, random_state=1
)
qiskit_circuit = to_qiskit(cirq_circuit)
circuit_cirq = from_qiskit(qiskit_circuit)
assert cirq.equal_up_to_global_phase(
cirq_circuit.unitary(), circuit_cirq.unitary()
)
def test_transform_qregs_two_qubit_ops(new_reg_sizes):
nqubits = sum(new_reg_sizes)
circ = to_qiskit(
cirq.testing.random_circuit(
nqubits, n_moments=5, op_density=1, random_state=1
)
)
orig = circ.copy()
new_qregs = [qiskit.QuantumRegister(s) for s in new_reg_sizes]
_transform_registers(circ, new_qregs=new_qregs)
assert circ.qregs == new_qregs
assert circ.cregs == orig.cregs
assert _equal(from_qiskit(circ), from_qiskit(orig))
def test_to_qiskit_assign_qregs(qreg_sizes):
nbits = sum(qreg_sizes)
cirq_circuit = cirq.testing.random_circuit(
nbits, n_moments=5, op_density=1, random_state=10
)
qregs = [qiskit.QuantumRegister(s) for s in qreg_sizes]
qiskit_circuit = to_qiskit(cirq_circuit, qregs=qregs)
assert qiskit_circuit.qregs == qregs
assert qiskit_circuit.cregs == []
cirq.testing.assert_allclose_up_to_global_phase(
cirq.unitary(from_qiskit(qiskit_circuit)),
cirq.unitary(cirq_circuit),
atol=1e-5,
)
def test_transform_qregs_random_circuit(new_reg_sizes, measure):
nbits = sum(new_reg_sizes)
circ = to_qiskit(
cirq.testing.random_circuit(
nbits, n_moments=5, op_density=1, random_state=10
)
)
creg = qiskit.ClassicalRegister(nbits)
circ.add_register(creg)
if measure:
circ.measure(circ.qregs[0], creg)
orig = circ.copy()
new_qregs = [qiskit.QuantumRegister(s) for s in new_reg_sizes]
_transform_registers(circ, new_qregs=new_qregs)
assert circ.qregs == new_qregs
assert _equal(from_qiskit(circ), from_qiskit(orig))
def test_to_qiskit_assign_qregs_and_cregs(qreg_sizes, measure, flip_creg):
nbits = sum(qreg_sizes)
cirq_circuit = cirq.testing.random_circuit(
nbits, n_moments=5, op_density=1, random_state=10
)
if measure:
cirq_circuit.append(cirq.measure_each(*cirq_circuit.all_qubits()))
qregs = [qiskit.QuantumRegister(s) for s in qreg_sizes]
cregs = [qiskit.ClassicalRegister(s) for s in qreg_sizes]
if flip_creg:
cregs = cregs[::-1]
qiskit_circuit = to_qiskit(cirq_circuit, qregs=qregs, cregs=cregs)
assert qiskit_circuit.qregs == qregs
assert qiskit_circuit.cregs == cregs
cirq.testing.assert_allclose_up_to_global_phase(
cirq.unitary(from_qiskit(qiskit_circuit)),
cirq.unitary(cirq_circuit),
atol=1e-5,
)
