Yes! There are several technologies for ransacking enemy systems as of Disharmony. They're escaping me at the moment and (both from my experience and by the fact that you're asking here) it's decently hard to find the Disharmony warfare tree with google. IIRC you can choose from the following:

 - Vanilla bombardment: captures system. Not what you want if you don't want to own the system (e.x. if you're having happiness trouble).