Peres–Horodecki criterion
IN QUANTUM INFORMATION THEORY, A NECESSARY CONDITION FOR THE JOINT DENSITY MATRIX OF TWO QUANTUM MECHANICAL SYSTEMS TO BE SEPARABLE
Positive partial transpose; Peres-Horodecki criterion; PPT criterion; Partial transpose
The Peres–Horodecki criterion is a necessary condition, for the joint density matrix \rho of two quantum mechanical systems A and B, to be separable. It is also called the PPT criterion, for positive partial transpose.