A note on positive partial transpose blocks

In this article, we study the class of positive partial transpose blocks. We introduce several inequalities related to this class with an emphasis on comparing the main diagonal and off-diagonal components of a 2 x 2 positive partial transpose block.

Automated summary

In this article, the concept of positive partial transpose blocks is studied, and several inequalities related to this concept are introduced, with a focus on comparing the main diagonal and off-diagonal components of a 2 x 2 positive partial transpose block.