::Yeah that's a possibility, theory vs implementations is a logical split. On the other hand, the more tables it's split into, the more we lose its timeline-ness: it's quite fun to see an idea proposed, and then scroll down a few years and see how it was first implemented. Or maybe some entries should appear in both tables: for example, how should we sort "In December, Ignacio Cirac, at University of Castilla-La Mancha at Ciudad Real, and Peter Zoller at the University of Innsbruck proposed an experimental realization of the controlled-NOT gate with trapped ions." - theory, or ion-trap? 

 :: Whichever we choose, I think we should use a sortable table like here to give people the chance to sort by field.