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License: GPL3
ubuntu2004

Kernel: Python 2

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Pauli Spin Matrices

In [4]:

import numpy as np

def com(A, B):
    return A.dot(B) - B.dot(A)
sigma = np.array(
    [[[0, 1],
      [1, 0]],
     [[0, -1j],
      [1j, 0]],
     [[1, 0],
      [0, -1]]])

assert np.allclose(com(sigma[0], sigma[1]), 2j*sigma[2]

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