On Positive Partial Transpose Matrices

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Mehmet Gumus
Jianzhen Liu
Samir Raouafi
Tin-Yau Tam


This paper mainly focuses on the class of $2 \times 2$ block PPT matrices. The relationship between PPT matrices and the norm inequalities is further explored. Some properties of a non-PPT matrix in terms of its eigenvalues are investigated. Moreover, a number of useful sufficient conditions for a matrix to be PPT are provided.

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