On the stratifications of 2-qubits X-state space

Arsen Khvedelidze, Astghik Torosyan

The 7-dimensional family ${\mathfrak{P}}_X$ of so-called mixed X-states of 2-qubits is considered. Two types of stratification of 2-qubits $X-$state space, i.e., partitions of $\math…