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Code block in is_separable #611

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Jun 1, 2024
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Code block in is_separable #611

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6212cc0
add blank line
purva-thakre Jun 1, 2024
cce291d
doctest failure
purva-thakre Jun 1, 2024
b66aa90
remove randomly generated rho
purva-thakre Jun 1, 2024
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14 changes: 12 additions & 2 deletions toqito/state_props/is_separable.py
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Expand Up @@ -35,16 +35,26 @@ def is_separable(state: np.ndarray, dim: None | int | list[int] = None, level: i
We provide the input as a denisty matrix :math:`\rho`.

On the other hand, a random density matrix will be an entangled state (a separable state).

>>> import numpy as np
>>> from toqito.rand import random_density_matrix
>>> from toqito.state_props import is_separable
>>> rho_separable = np.array([[1, 0, 1, 0],
... [0, 1, 0, 1],
... [1, 0, 1, 0],
... [0, 1, 0, 1]])
>>> rho_random = random_density_matrix(4)
>>> is_separable(rho_separable)
True
>>> is_separable(rho_random)

>>> rho_not_separable = np.array([[ 0.13407875+0.j , -0.08263926-0.17760437j,
... -0.0135111 -0.12352182j, 0.0368423 -0.05563985j],
... [-0.08263926+0.17760437j, 0.53338542+0.j ,
... 0.19782968-0.04549732j, 0.11287093+0.17024249j],
... [-0.0135111 +0.12352182j, 0.19782968+0.04549732j,
... 0.21254612+0.j , -0.00875865+0.11144344j],
... [ 0.0368423 +0.05563985j, 0.11287093-0.17024249j,
... -0.00875865-0.11144344j, 0.11998971+0.j ]])
>>> is_separable(rho_not_separable)
False

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