File size: 5,908 Bytes
9f8cf99 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | """Circuit conversion contracts for the qhybrid simulator payload."""
from __future__ import annotations
import json
from dataclasses import dataclass
from typing import TYPE_CHECKING, Any, Callable
QHYBRID_PAYLOAD_VERSION = 1
if TYPE_CHECKING:
from qiskit import QuantumCircuit as QiskitCircuit
@dataclass(frozen=True)
class QhybridGatePayload:
"""Typed payload for one gate in qhybrid JSON."""
gate_type: str | dict[str, list[float] | float]
qubits: list[int]
parameters: list[float]
def as_dict(self) -> dict[str, Any]:
return {
"gate_type": self.gate_type,
"qubits": self.qubits,
"parameters": self.parameters,
}
@dataclass(frozen=True)
class QhybridCircuitPayload:
"""Typed payload for a full qhybrid circuit."""
n_qubits: int
gates: list[QhybridGatePayload]
schema_version: int
name: str | None = None
def as_dict(self) -> dict[str, Any]:
return {
"schema_version": self.schema_version,
"n_qubits": self.n_qubits,
"gates": [gate.as_dict() for gate in self.gates],
"name": self.name,
}
GateConverter = Callable[[Any, list[int]], QhybridGatePayload]
def _default_gate_type(serde_gate: str, params: list[float]) -> str | dict[str, list[float] | float]:
if serde_gate in {"RX", "RY", "RZ", "P"}:
if len(params) != 1:
raise ValueError(f"{serde_gate} requires exactly one parameter")
return {serde_gate: params[0]}
if serde_gate == "U3":
if len(params) != 3:
raise ValueError("U3 requires exactly three parameters")
return {"U3": params}
if params:
raise ValueError(f"{serde_gate} does not accept parameters")
return serde_gate
def register_gate_converter(
qiskit_name: str,
serde_gate: str,
arity: int,
*,
expected_params: int | None = None,
) -> GateConverter:
"""Register a qiskit-name converter for a qhybrid gate type."""
qiskit_name = qiskit_name.lower()
if arity < 1 or arity > 3:
raise ValueError(f"Unsupported arity for {qiskit_name}: {arity}")
def _converter(operation: Any, op_qubits: list[int]) -> QhybridGatePayload:
if len(op_qubits) != arity:
raise ValueError(
f"{qiskit_name} expects {arity} qubits, got {len(op_qubits)}"
)
params = [float(value) for value in operation.params]
if expected_params is not None and len(params) != expected_params:
raise ValueError(
f"{qiskit_name} expects {expected_params} params, got {len(params)}"
)
gate_type = _default_gate_type(serde_gate, params)
return QhybridGatePayload(
gate_type=gate_type,
qubits=op_qubits,
parameters=params,
)
_GATE_CONVERTERS[qiskit_name] = _converter
return _converter
def _build_gate_converter_registry() -> dict[str, GateConverter]:
registry: dict[str, GateConverter] = {}
global _GATE_CONVERTERS
_GATE_CONVERTERS = registry
register_gate_converter("id", "I", arity=1)
register_gate_converter("x", "X", arity=1)
register_gate_converter("y", "Y", arity=1)
register_gate_converter("z", "Z", arity=1)
register_gate_converter("h", "H", arity=1)
register_gate_converter("s", "S", arity=1)
register_gate_converter("sdg", "Sdg", arity=1)
register_gate_converter("t", "T", arity=1)
register_gate_converter("tdg", "Tdg", arity=1)
register_gate_converter("rx", "RX", arity=1, expected_params=1)
register_gate_converter("ry", "RY", arity=1, expected_params=1)
register_gate_converter("rz", "RZ", arity=1, expected_params=1)
register_gate_converter("p", "P", arity=1, expected_params=1)
register_gate_converter("u", "U3", arity=1, expected_params=3)
register_gate_converter("u3", "U3", arity=1, expected_params=3)
register_gate_converter("cx", "CX", arity=2)
register_gate_converter("cy", "CY", arity=2)
register_gate_converter("cz", "CZ", arity=2)
register_gate_converter("ccx", "CCX", arity=3)
return registry
_GATE_CONVERTERS: dict[str, GateConverter] = _build_gate_converter_registry()
def get_supported_qiskit_gates() -> list[str]:
"""Return supported qiskit gate names (lower-case canonical)."""
return sorted(_GATE_CONVERTERS.keys())
def qiskit_to_qhybrid_json(qc: QiskitCircuit) -> str:
"""Convert a Qiskit circuit to a versioned qhybrid JSON payload."""
try:
from qiskit import transpile # type: ignore
except Exception as e: # pragma: no cover
raise ImportError("qiskit is required for qiskit_to_qhybrid_json") from e
qc = transpile(qc, basis_gates=["u", "cx"], optimization_level=0)
gates: list[QhybridGatePayload] = []
for instruction in qc.data:
operation = instruction.operation
operation_name = str(operation.name).lower()
if operation_name in {"barrier", "measure"}:
continue
converter = _GATE_CONVERTERS.get(operation_name)
if converter is None:
supported = ", ".join(get_supported_qiskit_gates())
raise NotImplementedError(
f"Unsupported gate for qhybrid: {operation.name}. "
f"Supported gates: {supported}"
)
op_qubits = [qc.find_bit(q).index for q in instruction.qubits]
gates.append(converter(operation, op_qubits))
payload = QhybridCircuitPayload(
schema_version=QHYBRID_PAYLOAD_VERSION,
n_qubits=qc.num_qubits,
gates=gates,
name=qc.name,
)
return json.dumps(payload.as_dict())
__all__ = [
"QHYBRID_PAYLOAD_VERSION",
"QhybridCircuitPayload",
"QhybridGatePayload",
"GateConverter",
"get_supported_qiskit_gates",
"qiskit_to_qhybrid_json",
"register_gate_converter",
]
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