c2_otimes_c4
bound_entangled.c2_otimes_c4.horodecki
https://arxiv.org/abs/quant-ph/9703004
horodecki(a_param)
Construct the 2×4 Horodecki bound-entangled state (arXiv:quant-ph/9703004).
One of the original examples of PPT entanglement, this state lives on
C^2 ⊗ C^4 and is PPT for every a_param in [0, 1], yet entangled (and
hence bound entangled) for every interior value a_param ∈ (0, 1). At
the endpoints the state is separable.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
a_param
|
float
|
free real parameter in [0, 1]. |
required |
Returns:
| Type | Description |
|---|---|
ndarray
|
np.ndarray: 8×8 density matrix of the 2×4 Horodecki state. |