UPBSepDistinguishable

UPBSepDistinguishable is a function that determines whether or not a given UPB is perfectly distinguishable by separable measurements. This question is interesting because it is known that all UPBs are indistinguishable by LOCC measurements, and all UPBs are distinguishable by PPT measurements. Separable measurements lie between these two classes.

Syntax

 * DIST = UPBSepDistinguishable(U,V,W,...)

Argument descriptions

 * U,V,W,...: Matrices, each with the same number of columns as each other, whose columns are the local vectors of the UPB.

Qutrit UPBs are distinguishable
It was shown in that all UPBs in $\mathbb{C}^3 \otimes \mathbb{C}^3$ are distinguishable by separable measurements. We can verify this fact for the "Tiles" UPB as follows:

The Feng UPB is indistinguishable
It was shown in that the UPB in $\mathbb{C}^4 \otimes \mathbb{C}^4$ found by K. Feng is indistinguishable by separable measurements. We can confirm this fact as follows: