def _generate_json(
self,
circuit: cirq.AbstractCircuit,
param_resolver: cirq.ParamResolverOrSimilarType,
) -> str:
"""Generates the JSON string from a Circuit.
The json format is defined as follows:
[[op_string,gate_exponent,qubits]]
which is a list of sequential quantum operations,
each operation defined by:
op_string: str that specifies the operation type: "X","Y","Z","MS"
gate_exponent: float that specifies the gate_exponent of the operation
qubits: list of qubits where the operation acts on.
Args:
circuit: Circuit to be run.
param_resolver: Param resolver for resolving parameters in circuit.
Returns:
json formatted string of the sequence.
Raises:
RuntimeError: If the circuit is empty.
"""
seq_list: List[
Union[Tuple[str, float, List[int]], Tuple[str, float, float, List[int]]]
] = []
circuit = cirq.resolve_parameters(circuit, param_resolver)
for op in circuit.all_operations():
line_qubit = cast(Tuple[cirq.LineQubit], op.qubits)
op = cast(cirq.GateOperation, op)
qubit_idx = [obj.x for obj in line_qubit]
op_str = get_op_string(op)
gate: Union[cirq.EigenGate, cirq.PhasedXPowGate]
if op_str == 'R':
gate = cast(cirq.PhasedXPowGate, op.gate)
seq_list.append(
(op_str, float(gate.exponent), float(gate.phase_exponent), qubit_idx)
)
else:
gate = cast(cirq.EigenGate, op.gate)
seq_list.append((op_str, float(gate.exponent), qubit_idx))
if len(seq_list) == 0:
raise RuntimeError('Cannot send an empty circuit')
json_str = json.dumps(seq_list)
return json_str
def validate_circuit(self, circuit: cirq.AbstractCircuit):
super().validate_circuit(circuit)
_verify_unique_measurement_keys(circuit.all_operations())