技術標籤：Pythonqiskit

IBM推出的qiskit是非常棒的Python量子模擬器

# coding=utf-8

import math
from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit
# 忽略告警
import warnings

warnings.filterwarnings('ignore')


# 定義量子傅立葉變換函式qft
def qft(circ, q, n):
    """n-qubit QFT on q in circ."""
    for j in range(n):
        for k in range(j):
            # 套用傅立葉就換
            circ.cu1(math.pi / float(2 ** (j - k)), q[j], q[k])
        circ.h(q[j])


# 量子位元數量
n = 3
q = QuantumRegister(n)
c = ClassicalRegister(n)

# 定義量子電路，後面可以視覺化
qft_n = QuantumCircuit(q, c)
qft(qft_n, q, n)
for i in range(n):
    qft_n.measure(q[i], c[i])
print(qft_n.qasm())

# 視覺化
from qiskit.tools.visualization import circuit_drawer

# 視覺化
circuit_drawer(qft_n, filename='./qft_circuit')
 

qft_circuit 用sublime開啟

more :https://zhuanlan.zhihu.com/p/267302584