Cloning by positive maps in von Neumann algebras
Andrzej Łuczak · Positivity · 2014
We investigate cloning in the general operator algebra framework in arbitrary dimension assuming only positivity instead of strong positivity of the cloning operation, generalizing thus results obtained so far under that stronger assumption. The weaker positivity assumption turns out quite natural when considering cloning in the general $$C^*$$ -algebra framework.