from __future__ import annotations
from typing import Optional, List
import numpy as np
from janus.circuit import Circuit
from janus.circuit.library import get_gate_class
from janus.circuit.dag import circuit_to_dag
from janus.circuit.library.standard_gates import (
HGate, XGate, YGate, ZGate,
RXGate, RYGate, RZGate, UGate,
CXGate
)
from .exceptions import ParameterError, GateNotSupportedError
# 导入其他分解函数
from .decompose_one_qubit import OneQubitEulerDecomposer, decompose_one_qubit
from .decompose_two_qubit_gate import decompose_two_qubit_gate
from .decompose_controlled_gate import decompose_controlled_gate
[文档]
def convert_circuit_to_instruction_set(
circuit: Circuit,
instruction_set: List[str],
use_dag: bool = False,
) -> Circuit:
"""
将电路转换为指定的指令集
Args:
circuit: Janus电路对象
instruction_set: 目标指令集（门名称列表）
use_dag: 是否返回DAGCircuit
Returns:
转换后的电路
"""
if not isinstance(instruction_set, list) or not instruction_set:
raise ParameterError("instruction_set must be a non-empty list of strings.")
if not all(isinstance(gate, str) for gate in instruction_set):
raise ParameterError("All elements in instruction_set must be strings.")
# 检查指令集中的门是否都支持
for gate_name in instruction_set:
gate_cls = get_gate_class(gate_name)
if gate_cls is None:
raise GateNotSupportedError(f"Unsupported gate type: {gate_name}")
# 递归转换函数，用于内部处理
def _convert_instructions(circuit, instruction_set):
converted_circuit = Circuit(n_qubits=circuit.n_qubits)
for inst in circuit.instructions:
gate_name = inst.name.lower()
qubits = inst.qubits
params = inst.params
# 如果门已经在目标指令集中，直接添加
if gate_name in instruction_set:
gate_cls = get_gate_class(gate_name)
if gate_cls == UGate:
# U门需要三个参数：theta, phi, lam
if len(params) == 0:
# 默认参数
converted_circuit.append(gate_cls(0, 0, 0), qubits)
elif len(params) == 1:
# 只有theta
converted_circuit.append(gate_cls(params[0], 0, 0), qubits)
elif len(params) == 2:
# theta和phi
converted_circuit.append(gate_cls(params[0], params[1], 0), qubits)
else:
# 完整参数
converted_circuit.append(gate_cls(params[0], params[1], params[2]), qubits)
elif gate_cls in [RXGate, RYGate, RZGate]:
# 旋转门需要一个角度参数
if params:
converted_circuit.append(gate_cls(params[0]), qubits)
else:
converted_circuit.append(gate_cls(0), qubits)
else:
# 其他门直接添加
converted_circuit.append(gate_cls(params), qubits)
else:
# 分解实现
if gate_name in ['h', 'x', 'y', 'z', 's', 't', 'rx', 'ry', 'rz', 'u']:
# 单比特门，使用分解函数
if 'u' in instruction_set:
# 使用OneQubitEulerDecomposer分解为U门
decomposer = OneQubitEulerDecomposer(basis="U", use_dag=False)
decomposed_circuit = decomposer(inst.operation)
# 将分解后的门添加到目标电路中，注意保持原始比特位置
for decomposed_inst in decomposed_circuit.instructions:
converted_circuit.append(decomposed_inst.operation, qubits)
elif all(g in instruction_set for g in ['rx', 'ry', 'rz']):
# 使用OneQubitEulerDecomposer分解为RX/RY/RZ组合
decomposer = OneQubitEulerDecomposer(basis="ZYZ", use_dag=False)
decomposed_circuit = decomposer(inst.operation)
# 将分解后的门添加到目标电路中，注意保持原始比特位置
for decomposed_inst in decomposed_circuit.instructions:
converted_circuit.append(decomposed_inst.operation, qubits)
else:
raise ValueError(f"Cannot decompose {gate_name} into target instruction set")
elif gate_name == 'cz':
# 两比特门: CZ分解
if 'cx' in instruction_set and 'u' in instruction_set:
# CZ门分解: CX = H*CZ*H
# 所以 CZ = H*CX*H
control, target = qubits
# 目标比特上应用H门（转换为U门）
converted_circuit.append(UGate(np.pi/2, 0, np.pi), [target])
# 应用CX门
converted_circuit.append(CXGate(), [control, target])
# 目标比特上应用H门（转换为U门）
converted_circuit.append(UGate(np.pi/2, 0, np.pi), [target])
else:
raise ValueError(f"Cannot decompose cz into target instruction set. Need 'cx' and 'u' gates.")
elif gate_name == 'swap':
# 两比特门: SWAP分解为三个CX门
if 'cx' in instruction_set:
# 使用decompose_two_qubit_gate函数分解为CX门
decomposed_circuit = decompose_two_qubit_gate(inst.operation, basis_gate='cx', use_dag=False)
# 将分解后的门添加到目标电路中，注意保持原始比特位置
qubit1, qubit2 = qubits
for decomposed_inst in decomposed_circuit.instructions:
# 映射分解电路的比特到原始比特
decomposed_qubits = decomposed_inst.qubits
if len(decomposed_qubits) == 2:
# 两比特门
mapped_qubits = [qubit1 if q == 0 else qubit2 for q in decomposed_qubits]
else:
# 单比特门
mapped_qubits = [qubit1 if q == 0 else qubit2 for q in decomposed_qubits]
converted_circuit.append(decomposed_inst.operation, mapped_qubits)
else:
raise ValueError(f"Cannot decompose swap into target instruction set. Need 'cx' gate.")
elif gate_name == 'crz':
# 两比特门: CRZ分解为RZ和CX门
if 'cx' in instruction_set and 'rz' in instruction_set:
control, target = qubits
theta = params[0] if params else 0
# CRZ门分解: CRZ(θ) = (I⊗H) * CNOT * (I⊗RZ(θ/2)) * CNOT * (I⊗RZ(-θ/2)) * (I⊗H)
if 'u' in instruction_set:
# H门转换为U门
converted_circuit.append(UGate(np.pi/2, 0, np.pi), [target])
else:
converted_circuit.append(HGate(), [target])
converted_circuit.append(CXGate(), [control, target])
converted_circuit.append(RZGate(theta/2), [target])
converted_circuit.append(CXGate(), [control, target])
converted_circuit.append(RZGate(-theta/2), [target])
if 'u' in instruction_set:
# H门转换为U门
converted_circuit.append(UGate(np.pi/2, 0, np.pi), [target])
else:
converted_circuit.append(HGate(), [target])
else:
raise ValueError(f"Cannot decompose crz into target instruction set. Need 'cx' and 'rz' gates.")
else: # gate_name not in ['cz', 'swap', 'crz']
# 检查是否是多受控门
# 多受控门的名称通常以多个'c'开头，如'ccx'表示双受控X门
if gate_name.startswith('c') and len(gate_name) > 1:
# 多受控门应该在电路转换前使用受控门分解函数进行预处理
raise ValueError(f"Multi-controlled gate {gate_name} not supported in convert_circuit_to_instruction_set. "
f"Please decompose multi-controlled gates first using controlled gate decomposition functions.")
else:
# 尝试使用通用分解函数
if len(qubits) == 1:
# 单比特门
if 'u' in instruction_set:
decomposer = OneQubitEulerDecomposer(basis="U", use_dag=False)
decomposed_circuit = decomposer(inst.operation)
# 将分解后的门添加到目标电路中
for decomposed_inst in decomposed_circuit.instructions:
converted_circuit.append(decomposed_inst.operation, qubits)
else:
raise ValueError(f"Cannot decompose {gate_name} into target instruction set")
elif len(qubits) == 2:
# 两比特门
if 'cx' in instruction_set:
decomposed_circuit = decompose_two_qubit_gate(inst.operation, basis_gate='cx', use_dag=False)
# 将分解后的门添加到目标电路中，注意保持原始比特位置
qubit1, qubit2 = qubits
for decomposed_inst in decomposed_circuit.instructions:
# 映射分解电路的比特到原始比特
decomposed_qubits = decomposed_inst.qubits
if len(decomposed_qubits) == 2:
# 两比特门
mapped_qubits = [qubit1 if q == 0 else qubit2 for q in decomposed_qubits]
else:
# 单比特门
mapped_qubits = [qubit1 if q == 0 else qubit2 for q in decomposed_qubits]
converted_circuit.append(decomposed_inst.operation, mapped_qubits)
else:
raise ValueError(f"Cannot decompose {gate_name} into target instruction set")
else:
raise ValueError(f"Cannot decompose {gate_name} with {len(qubits)} qubits into target instruction set")
return converted_circuit
# 使用内部递归函数进行转换
final_circuit = _convert_instructions(circuit, instruction_set)
if use_dag:
return circuit_to_dag(final_circuit)
return final_circuit