Two-qubit entanglement space is parameterized by a 3-simplex and two octahedra, and the rank-4 separable states are written as a polynomial inequality system.
Quesne, SU(2)×SU(2) scalars in the enveloping algebra of SU(4) , J
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Towards parameterizing the entanglement body of a qubit pair
Two-qubit entanglement space is parameterized by a 3-simplex and two octahedra, and the rank-4 separable states are written as a polynomial inequality system.