Journal of Physics A Mathematical and General
Complex positive maps and quaternionic unitary evolution
M. Asorey, G. Scolarici
Abstract
The complex projection of any n -dimensional quaternionic unitary dynamics defines a one-parameter positive semigroup dynamics. We show that the converse is also true, i.e. that any one-parameter positive semigroup dynamics of complex density matrices with maximal rank can be obtained as the complex projection of suitable quaternionic unitary dynamics.