I'm glad to see this was going somewhere. I'd say yes, if humans have free will, than an AGI could too. If not on present semiconductor designs, than with some 1cc electrolyte solution or something. But free will without the human endocrine system isn't the type of definition most people mean when they envision free will. But I suppose a smart enough AGI could deduce and brute force it. Splitting off world-lines loses much of the fun without a mind, even if it can technically be called free will. I'd want to read some physics abstracts before commenting further about free will.