"""
Quantum Circuit Module for NSAF
------------------------------
Author: Bolorerdene Bundgaa
Contact: bolor@ariunbolor.org
Website: https://bolor.me
Implements quantum circuit operations for symbolic computation.
"""
import numpy as np
from typing import List, Optional, Tuple, Dict, Any
from dataclasses import dataclass
from enum import Enum
class GateType(Enum):
"""Supported quantum gate types"""
H = "Hadamard" # Hadamard gate for superposition
X = "PauliX" # Pauli-X (NOT) gate
Y = "PauliY" # Pauli-Y gate
Z = "PauliZ" # Pauli-Z gate
CNOT = "CNOT" # Controlled-NOT gate
SWAP = "SWAP" # SWAP gate
T = "T" # T gate for non-Clifford operations
S = "S" # S gate (phase gate)
RX = "RotationX" # Rotation around X-axis
RY = "RotationY" # Rotation around Y-axis
RZ = "RotationZ" # Rotation around Z-axis
@dataclass
class QuantumGate:
"""Represents a quantum gate operation"""
gate_type: GateType
target_qubits: List[int]
control_qubits: Optional[List[int]] = None
parameters: Optional[Dict[str, float]] = None
class QuantumState:
"""Represents the state of a quantum system"""
def __init__(self, num_qubits: int):
"""Initialize a quantum state with given number of qubits"""
self.num_qubits = num_qubits
self.amplitudes = np.zeros(2**num_qubits, dtype=np.complex128)
self.amplitudes[0] = 1.0 # Initialize to |0...0⟩ state
def apply_gate(self, gate: QuantumGate) -> None:
"""Apply a quantum gate to the state"""
# Implementation will use numpy for matrix operations
pass
def measure(self, qubit: int) -> Tuple[int, float]:
"""Measure a specific qubit and return the result and probability"""
# Implementation will handle measurement and state collapse
pass
class QuantumCircuit:
"""Main quantum circuit class for symbolic computation"""
def __init__(self, num_qubits: int):
"""Initialize quantum circuit with specified number of qubits"""
self.num_qubits = num_qubits
self.state = QuantumState(num_qubits)
self.gates: List[QuantumGate] = []
def add_gate(self, gate_type: GateType, target_qubits: List[int],
control_qubits: Optional[List[int]] = None,
parameters: Optional[Dict[str, float]] = None) -> None:
"""Add a quantum gate to the circuit"""
gate = QuantumGate(gate_type, target_qubits, control_qubits, parameters)
self.gates.append(gate)
def hadamard(self, qubit: int) -> None:
"""Apply Hadamard gate to create superposition"""
self.add_gate(GateType.H, [qubit])
def cnot(self, control: int, target: int) -> None:
"""Apply CNOT gate between control and target qubits"""
self.add_gate(GateType.CNOT, [target], [control])
def rx(self, qubit: int, angle: float) -> None:
"""Apply rotation around X-axis"""
self.add_gate(GateType.RX, [qubit], parameters={"angle": angle})
def ry(self, qubit: int, angle: float) -> None:
"""Apply rotation around Y-axis"""
self.add_gate(GateType.RY, [qubit], parameters={"angle": angle})
def rz(self, qubit: int, angle: float) -> None:
"""Apply rotation around Z-axis"""
self.add_gate(GateType.RZ, [qubit], parameters={"angle": angle})
def swap(self, qubit1: int, qubit2: int) -> None:
"""Swap two qubits"""
self.add_gate(GateType.SWAP, [qubit1, qubit2])
def measure_qubit(self, qubit: int) -> Tuple[int, float]:
"""Measure a specific qubit"""
return self.state.measure(qubit)
def run(self) -> QuantumState:
"""Execute the quantum circuit"""
self.state = QuantumState(self.num_qubits)
for gate in self.gates:
self.state.apply_gate(gate)
return self.state
def reset(self) -> None:
"""Reset the circuit to initial state"""
self.state = QuantumState(self.num_qubits)
self.gates.clear()
def to_matrix(self) -> np.ndarray:
"""Convert the circuit to its matrix representation"""
# Implementation will compute the unitary matrix for the circuit
pass
def simulate(self, shots: int = 1000) -> Dict[str, int]:
"""Simulate the circuit for multiple shots"""
results: Dict[str, int] = {}
for _ in range(shots):
# Run circuit and collect measurement statistics
# Implementation will handle measurement and statistics
pass
return results
def draw(self) -> str:
"""Return ASCII art representation of the circuit"""
# Implementation will create a text-based visualization
circuit_str = []
for i in range(self.num_qubits):
wire = [f"q{i}: "]
for gate in self.gates:
if i in gate.target_qubits:
wire.append(f"-[{gate.gate_type.value}]-")
elif gate.control_qubits and i in gate.control_qubits:
wire.append("--•--")
else:
wire.append("-----")
circuit_str.append("".join(wire))
return "\n".join(circuit_str)
