Someone know any paper about matrix separability preservation under conjugation? A well know result is that Clifford group preserve the Pauli group under conjugation, or in other words, will result in a 4x4 matrix in Pauli group, that also is a kronecker product of the other two 2x2 pauli matrices. Then, I'm find a critery to a matrix preserve the separability of another matrix, say , by conjugation... Thus, .
So, someone can help-me?