def new_scaling_function(circuit: QPROGRAM, *args: Any,
**kwargs: Any) -> QPROGRAM:
# Convert to Mitiq representation.
mitiq_circuit, input_circuit_type = convert_to_mitiq(circuit)
# Scale the noise in the circuit.
scaled_circuit = noise_scaling_function(mitiq_circuit, *args, **kwargs)
if kwargs.get("return_mitiq") is True:
return scaled_circuit
# Base conversion back to input type.
scaled_circuit = convert_from_mitiq(scaled_circuit, input_circuit_type)
# Keep the same register structure in Qiskit circuits.
if input_circuit_type == "qiskit":
from mitiq.mitiq_qiskit.conversions import _transform_registers
_transform_registers(
scaled_circuit,
new_qregs=circuit.qregs,
new_cregs=circuit.cregs if scaled_circuit.cregs else None,
)
if circuit.cregs and not scaled_circuit.cregs:
scaled_circuit.add_register(*circuit.cregs)
return scaled_circuit
def new_scaling_function(
circuit: QPROGRAM, *args: Any, **kwargs: Any
) -> QPROGRAM:
scaled_circuit = atomic_converter(noise_scaling_function)(
circuit, *args, **kwargs
)
# Keep the same register structure and measurement order with Qiskit.
if "qiskit" in scaled_circuit.__module__:
from mitiq.mitiq_qiskit.conversions import (
_transform_registers,
_measurement_order,
)
scaled_circuit.remove_final_measurements()
_transform_registers(
scaled_circuit,
new_qregs=circuit.qregs,
new_cregs=circuit.cregs if scaled_circuit.cregs else None,
)
if circuit.cregs and not scaled_circuit.cregs:
scaled_circuit.add_register(*circuit.cregs)
for q, c in _measurement_order(circuit):
scaled_circuit.measure(q, c)
return scaled_circuit
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_transform_cregs(nbits, with_ops, measure):
qreg = qiskit.QuantumRegister(nbits)
creg = qiskit.ClassicalRegister(nbits)
circ = qiskit.QuantumCircuit(qreg, creg)
if with_ops:
circ.h(qreg)
if measure:
circ.measure(qreg, creg)
orig = circ.copy()
new_cregs = [qiskit.ClassicalRegister(1) for _ in range(nbits)]
_transform_registers(circ, new_cregs=new_cregs)
assert circ.cregs == new_cregs
assert circ.qregs == orig.qregs
assert _equal(from_qiskit(circ), from_qiskit(orig))
def test_transform_qregs_and_cregs_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]
new_cregs = [qiskit.ClassicalRegister(s) for s in new_reg_sizes]
_transform_registers(circ, new_qregs=new_qregs, new_cregs=new_cregs)
assert circ.qregs == new_qregs
assert circ.cregs == new_cregs
assert _equal(from_qiskit(circ), from_qiskit(orig))
def test_transform_registers_wrong_bit_number():
nqubits = 2
circ = qiskit.QuantumCircuit(qiskit.QuantumRegister(nqubits))
new_qregs = [qiskit.QuantumRegister(1) for _ in range(2 * nqubits)]
with pytest.raises(ValueError):
_transform_registers(circ, new_qregs=new_qregs)
new_cregs = [qiskit.ClassicalRegister(1)]
with pytest.raises(ValueError):
_transform_registers(circ, new_cregs=new_cregs)
with pytest.raises(ValueError):
_transform_registers(circ, new_qregs, new_cregs)